CS FTL.1.235 Rest Periods

Previous page
CS FTL.1.230

Reserve

ORO.FTL.235 Rest Periods

(a)       Disruptive schedules

(1)   If a transition from a late finish/night duty to an early start is planned at home base, the rest period between the 2 FDPs includes 1 local night.

(2)   If a crew member performs 4 or more night duties, early starts or late finishes between 2 extended recovery rest periods as defined in ORO.FTL.235(d), the second extended recovery rest period is extended to 60 hours.

(b)       Time zone differences

(1)   For the purpose of ORO.FTL.235(e)(1), ‘rotation’ is a series of duties, including at least one flight duty, and rest period out of home base, starting at home base and ending when returning to home base for a rest period where the operator is no longer responsible for the accommodation of the crew member.

(2)   The operator monitors rotations and combinations of rotations in terms of their effect on crew member fatigue, and adapts the rosters as necessary.

(3)   Time zone differences are compensated by additional rest, as follows:

GM1 CS FTL.1.235(b)(3) Rest Periods

GM2 CS FTL.1.235(b)(3) Additional rest to compensate for time zone differences

(i)    At home base, if a rotation involves a 4 hour time difference or more, the minimum rest is as specified in the following table.

Minimum local nights of rest at home base to compensate for time zone differences

Maximum time difference (h) between reference
time and local time where a crew member rests during a rotation

Time elapsed (h) since reporting for the first
FDP in a rotation involving at least 4-hour time difference to the reference time

< 48

48 – 71:59

72 – 95:59

≥ 96

≤ 6

2

2

3

3

> 6 and ≤ 9

2

3

3

4

> 9 and ≤ 12

2

3

4

5

(ii)   Away from home base, if an FDP involves a 4-hour time difference or more, the minimum rest following that FDP is at least as long  as the preceding duty period, or 14 hours, whichever is greater. By way of derogation from point (b)(3)(i) and only once between 2 recurrent extended recovery rest periods as specified in ORO.FTL.235(d), the minimum rest provided under this point (b)(3)(ii) may also apply to home base if the operator provides suitable accommodation to the crew member.

(4)   In case of an Eastward-Westward or Westward-Eastward transition, at least 3 local nights of rest at home base are provided between alternating rotations.

(5)   The monitoring of combinations of rotations is conducted under the operator’s management system provisions.

(c)       Reduced rest

(1)   The minimum reduced rest periods under reduced rest arrangements are 12 hours at home base and 10 hours out of base.

(2)   Reduced rest is used under fatigue risk management.

(3)   The rest period following the reduced rest is extended by the difference between the minimum rest period specified in ORO.FTL.235(a) or (b) and the reduced rest.

(4)   The FDP following the reduced rest is reduced by the difference between the minimum rest period specified in ORO.FTL.235(a) or (b) as applicable and the reduced rest.

(5)   There is a maximum of 2 reduced rest periods between 2 recurrent extended recovery rest periods specified in accordance with ORO.FTL.235(d).

25 thoughts on “CS FTL.1.235 Rest Periods

    1. Rolf,
      Your question was:

      After a night duty, must the following rest period include a local night? Or is it possible to checkin 0710 the following day? ( early type)

      Let me assume that the entire series of FDP operates in the same time zone.

      First lets look at the definitions:

      (8) “disruptive schedule

      means a crew member’s roster which disrupts the sleep opportunity during the optimal sleep time window by comprising an FDP or a combination of FDPs which encroach, start or finish during any portion of the day or of the night where a crew member is acclimatised. A schedule may be disruptive due to early starts, late finishes or night duties.

      (a) “early type” of disruptive schedule means:

      (i) for “early start” a duty period starting in the period between 05:00 and 05:59 in the time zone to which a crew member is acclimatised; and

      (ii) for “late finish” a duty period finishing in the period between 23:00 and 01:59 in the time zone to which a crew member is acclimatised;

      (9) “night duty

      means a duty period encroaching any portion of the period between 02:00 and 04:59 in the time zone to which the crew is acclimatised;

      (16) “local night

      means a period of 8 hours falling between 22:00 and 08:00 local time;

      First off the rest period must qualify as a rest period:

      A period of no less than 10:00 where the crew member is free from duty, that is know in advance to the crew member.

      Under CS FTL.1(a) Rest periods:

      (a) Disruptive schedules

      (1) If a transition from a late finish/night duty to an early start is planned at home base, the rest period between the 2 FDPs includes 1 local night.

      A night duty touches any portion of the time from 02:00 to 04:59 and an early start duty is a duty that commences 05:00 to 05:59.

      Example 1)

      A night duty that ends at 02:01 may be followed by a rest period of no less than 10:00, meaning that the next duty may not start any earlier than 12:01 the same calendar day. That duty is NOT a early start as it will not begin in the early start window 05:00 to 05:59. This is legal.

      A late finish duty is a duty that ends between 23:00 to 01:59.

      Example 2)

      A late finish duty that ends at 23:01 must have a 10:00 rest period so the earliest the crew member may report for the next duty is 09:01 the next calendar day. Again, this duty is NOT a early start as it will not begin in the early start window 05:00 to 05:59. This is legal.

      Example 3)

      A night duty that begins at 04:59 and ends at 10:00, may commence another duty at or after 20:00 the same day, the next duty may be a late finish or night duty.

      Example 4)

      If the next duty following the night duty as described in example 3 is a early start the intervening rest period must include a local night rest.

      A local nights rest must include 8:00 between 22:00 and 08:00,

      Meaning that the 8:00 hour period must begin not earlier than 22:00, and may not begin later than 00:00. The respective windows are 06:00 and 08:00.

      Should the next duty following the night duty ending on day 1 at 10:00 be an early start at 05:45 the total rest period between the two duties is from 10:00 day 1 to 22:00 day 1, plus 22:00 day 1 to 06:00 day 2 plus 06:00 day 2 to 05:45 day 3. 12:00 + 8:00 + 23:45 = 43:45

      The earliest the early start may be assigned is at 05:45 day 3.

      The duty you described starting at 07:10 is not an early start as it does not meet the criteria, however, it does not seem the meet the rest requirements (10:00).

      example 5)

      If you are describing a split duty, then the rest period may be reduced to a break in duty under ORO.FTL.220 Split duty. The two portions of the split duty must permit for a break of no less than 3:00. So for a break ending at 07:10, it must begin no later than 04:10, but the entire FDP is viewed as viewed as one continuous night duty, not a night duty followed by a day time duty.

      With a split duty where the second portion begins at 05:45, the break must begin no later than 02:45. Again the entire FDP is viewed as one continuous night, not a night duty followed by an early start.

      Please check with your airline, local CAA or the EASA as I am sure they could have different views.

      /Garret

      Like

  1. I have a question about recurrent extended recovery rest period. Minimum is one local day and two local nights. So the duty shall finish (not flight duty) latest 2200local on day1 and start earliest on day3 at 0800local time (actual reporting time). Total 36 hours of rest.

    What if two local days off are assigned, when can be the earliest checkin on day4?
    Assume FDP operates in the same time zone.

    Thank you

    Like

    1. You asked the following:

      I have a question about recurrent extended recovery rest period. Minimum is one local day and two local nights. So the duty shall finish (not flight duty) latest 2200local on day1 and start earliest on day3 at 0800local time (actual reporting time). Total 36 hours of rest.

      What if two local days off are assigned, when can be the earliest checkin on day4?
      Assume FDP operates in the same time zone.

      Thank you

      the applicable regulation is:

      ORO.FTL.235 Rest Periods

      (d) Recurrent extended recovery rest periods (RERRP)

      Flight time specification schemes shall specify recurrent extended recovery rest periods to compensate for cumulative fatigue. The minimum recurrent extended recovery rest period shall be 36 hours, including 2 local nights, and in any case the time between the end of one recurrent extended recovery rest period and the start of the next extended recovery rest period shall not be more than 168 hours. The recurrent extended recovery rest period shall be increased to 2 local days twice every month.

      Since it is defined as a rest period it must meet the conditions of a rest

      ORO.FTL.105 Definitions

      (16) “local night (LNR)” means a period of 8 hours falling between 22:00 and 08:00 local time;

      (21) “rest period” means a continuous, uninterrupted and defined period of time, following duty or prior to duty, during which a crew member is free of all duties, standby and reserve;

      So a rest period must be known in advance, and completely free of duty for the continuous period of time. Since it it a singular rest period no duty may intervene during the start and end of that period.

      For a RERRP to exist it must meet certain conditions:

      1. it is a single defined period of rest

      2. it is no less than 36:00 in duration and it contains two LNR’s.

      A LNR may start no later than 24:00, and it may end No earlier than 06:00.

      To satisfy condition 1 look at the start time of your RERRP and add 36:00,

      a RERRP starting at 18:00 (day 1) + 36:00 = 54:00 (06:00 day 3)

      a RERRP starting at 20:00 (day 1) + 36:00 = 56:00 (08:00 day 3),

      a RERRP starting at 22:00 (day 1) + 36:00 = 58:00 (10:00 day 3)

      a RERRP starting at 23:59 (day 1) + 36:00 = 59:59 (11:59 day 3)

      To satisfy the second condition you must have two LNR’s,
      To have a LNR, it must contain 8:00 continuous rest.
      A LNR that starts at 21:00 must not end earlier 06:00, since a LNR cannot start earlier than 22:00 we add 8:00 22:00 + 8:00 = 30:00 (06:00 the next day), a LNR may start after 22:00 but no later than 24:00, so a LNR that starts at 23:00 + 8:00 = 31:00 (07:00 next day), and a LNR that starts at 24:00 + 8:00 = (32:00 (08:00) the next day.

      The second of the LNR in a RERRP would be expected to start no later than 22:00, so it must always include the time and end no earlier than 06:00 day 3.

      Knowing the start time of your RERRP you must find the difference from 06:00 day 3 – so a RERRP that starts at 16:00 day 1 to 06:00 day 3 is 38:00, which is greater than 36:00 so the cm must be off for at least 38:00.

      The easiest way to figure this out is if your RERRP starts before 18:00, the minimum rest = (18:00 – RERRP start) + 36:00.
      So a RERRP that starts at 02:30 is (18:00 – 02:30) + 36:00 = 15:30 + 36:00 = 51:30

      If your RERRP starts at 18:00 up to 24:00, it is just 36:00.

      Lastly, the RERRP must be extended to included two full local days off, 2 times per month, meaning a 48:00 period starting at midnight and ending no earlier than midnight 48:00 later, So a RERRP starting at 23:00 must be no less than 49:00, and a RERRP starting at 22:00 must be no less than 50:00, to satisfy this condition.

      A RERRP starting at 23:00 day 1 and ending at 03:00 day 4 for a duration of 52:00 is legal.

      Here is a small excel spread sheet you can use.
      RERRP.xlsx
      /Garret

      Like

  2. Can you Help Me with this…
    My duty Starts 11.07.2017 23:50 (L) Ends 12.07.2017 06:00 (L)
    and They Assign another Duty at 13.07.2017 04:25 (L)
    without any Night Rest…
    Isnt this Distruptive Duty?

    Like

    1. Huseyinmurat,
      you asked the following:
      Can you Help Me with this…
      My duty Starts 11.07.2017 23:50 (L) Ends 12.07.2017 06:00 (L)
      and They Assign another Duty at 13.07.2017 04:25 (L)
      without any Night Rest…
      Isnt this Distruptive Duty?

      ORO.FTL.105 provides the following definitions:

      (8) “disruptive schedule” means a crew member’s roster which disrupts the sleep opportunity during the optimal sleep time window by comprising an FDP or a combination of FDPs which encroach, start or finish during any portion of the day or of the night where a crew member is acclimatised. A schedule may be disruptive due to early starts, late finishes or night duties.
      (a) “early type” of disruptive schedule means:

      (i) for “early start” a duty period starting in the period between 05:00 and 05:59 in the time zone to which a crew member is acclimatised; and

      (ii) for “late finish” a duty period finishing in the period between 23:00 and 01:59 in the time zone to which a crew member is acclimatised;
      (b) “late type” of disruptive schedule means:

      (i) for “early start” a duty period starting in the period between 05:00 and 06:59 in the time zone to which a crew member is acclimatised; and

      (ii) for “late finish” a duty period finishing in the period between 00:00 and 01:59 in the time zone to which a crew member is acclimatised;

      (9) “night duty” means a duty period encroaching any portion of the period between 02:00 and 04:59 in the time zone to which the crew is acclimatised;

      GM1 ORO.FTL.105(8) Definitions

      DETERMINATION OF DISRUPTIVE SCHEDULES

      If a crew member is acclimatised to the local time at his/her home base, the local time at the home base should be used to consider an FDP as ‘disruptive schedule’. This applies to operations within the 2-hour wide time zone surrounding the local time at the home base, if a crew member is acclimatised to the local time at his/her home base.

      I assume that you are acclimated and that the times reflect home base time.

      The first duty is clearly a Night Duty. The second duty would also be considered a Night Duty as it will start before 05:00 and will fall in the window of a night duty.

      With that said, it appears that the schedule is two consecutive night duties. A schedule is considered as disruptive if a transition exists from a late duty to an early start duty, or if a transition exists from a night duty to an early start duty.

      Under a disruptive duty, the rest period before the early start should include 1 local nights rest.
      CS FTL.1.235 Rest Periods

      (a) Disruptive schedules

      (1) If a transition from a late finish/night duty to an early start is planned at home base, the rest period between the 2 FDPs includes 1 local night.

      While the schedule is not disruptive, it has consecutive night duties. The first duty is 6:10, so I would assume that it will have 4 sectors or less.

      The second duty, must also contain 4 sectors or less as required under:
      CS FTL.1.205 Flight Duty Period (FDP)

      (a) Night duties under the provisions of ORO.FTL.205(b) and (d) comply with the following:

      (1) When establishing the maximum FDP for consecutive night duties, the number of sectors is limited to 4 sectors per duty.

      At this time it appear that the schedule is legal.

      /Garret

      Like

  3. Hello. I have a question. I am a UK based cabin crew and I am thinking of commuting from Japan to the UK for work. Could you please kindly let me know how many local (UK) night I need before a flying duty (short and long haul)? I always thought I need 1 local night before my duty but the table above confuses me…
    Thank you very much in advance.

    Liked by 1 person

    1. The table presented in CS FTL.1.235 Rest Periods is to be used when crew member has completed a trip.

      With that said, if your airline expects you to be acclimated at the start of a trip beginning in the UK, then it would be reasonable for you to be in the same timezone as your base, in accordance with Table 1 (ORO.FTL Definitions). 96:00 minimum based on your actual home of Japan (UTC+9).

      If you give yourself less than 48:00 since you departed from Japan, you may be acclimated to Japan time versus being acclimated to UK time.

      Remember, you need to follow ORO.FTL 115 Crew Member Responsibilities

      I think you should discuss this with your airline, they may be able to offer insights as to what they consider a reasonable amount of time.

      Like

  4. Hello,
    Please, I have a question. My stby started 0620utc. I was called in and my briefing started 1030utc and on block time was 1905 so my duty ended 1935utc. How long is my rest gonna be, please?

    Like

    1. Filip,
      You asked the following:
      Please, I have a question. My stby started 0620utc. I was called in and my briefing started 1030utc and on block time was 1905 so my duty ended 1935utc. How long is my rest gonna be, please?

      I assume that the Standby (STBY) is not at the Airport.
      When a crew member (CM) is on STBY, they are not at rest, they are also not on duty for the purposes of determining the daily rest requirements under ORO.FTL.235.

      In the specific case you are presenting:
      The CM is on duty from 10:30 UTC until 19:35 UTC, 09:05. Depending whether the CM will be provided a rest at/away from base, will determine whether the minimum rest is 12:00 (in base) or 10:00 (away from base). The Rest in base may reduced to 10:00 provided the CM is provided a suitable accommodation.

      If we assume that the CM is in base and a suitable accommodation is not provided, the uninterrupted rest of 12:00 may end no earlier than 07:35 UTC the next day.
      A cm originally rostered for a series of STBY than begin at 6:20 UTC and ending at 18:20 UTC each day, would require to have the STBY following the FDP starting at 10:30 to 19:35 UTC; rescheduled to begin no earlier than 07:35 UTC.

      ORO.FTL.225 & CS FTL.1.225 refer to the Standby Requirements, while ORO.FTL.235 & CS FTL.1.235 refer to Rest Requirements.

      /Garret

      Like

  5. Hello
    and here is another question. It’s about night flight duty limitation.
    First, schedule:
    day1 check-in at 0400z, leaving homebase as positioning DHC to outbase, followed by 2 active sectors, total duty (positioning + 5h of flight duty) 7hours
    day2 check-in at 0410z, 4 sectors, duty 10 hours
    day3 check-in at 1010z, 4sectors, duty 8 hours
    day4 check-in at 2010z, 2sectors during night, negative inflight rest, 3h 10min of ground time between sectors, second sector landing on day5 at 0415z.
    day5 check-in at 1815z, only positioning to homebase as DHC, planned landing at 2000z.

    Planned check-in is always 1hour before take-off, although pick-up from hotel at outbase is 1h40min before fake-off.

    Questions:
    Is it possible to be DHC to homebase after those two night sectors already in the morning on the day 5?
    Let’s say, i could catch morning flight to homebase at 0635z (take off) instead of evening flight at 1915z (take off) as it is originally planned.
    Is CS FTL.1.205 applicable here?
    Could you also explain duty time regulations for last positioning DHC. Company regulated pick up time from hotel to airport is 1h 40min before take-off(1915z). Acft landing at 2000z at homebase. Normal reporting time at homebase is 1h before t/off. What is now my total ‘DHC’ duty time on the way to homebase.

    Thank you, Joze

    Like

    1. Jose,
      Analysis:
      The following duties are considered Night Duties:
      Day 1 2 sectors 7:00 FDP, Day 2 4 sectors 10:00 FDP and Day 4 2 sectors 8:05 FDP.
      Day 3 is a day time duty that begins after the Early Start envelope (05:00 – 6:59) and ends before the Late Finish Envelope (23:00 to 01:59).
      Legally, there is no transition from Late Finish/Night Duty to Early Start, From Day 2 to Day 3 and you are being provided with 16:00 rest that includes a Local Nights Rest before the start of the FDP day 3.
      The rest that follows the FDP Day 3 is 26:00 and also includes a Local Nights rest.

      The schedule appears to be legal.

      Questions:
      Is it possible to be DHC to homebase after those two night sectors already in the morning on the day 5?
      Yes, A DHD only Duty is not a FDP.

      Let’s say, i could catch morning flight to homebase at 0635z (take off) instead of evening flight at 1915z (take off) as it is originally planned.
      Is CS FTL.1.205 applicable here?

      The FDP still ends at 4:15 day 5, so the FDP remains at 8:05. However the Duty time has now increased to 11:15. The minimum rest upon return to base remains 12:00.

      Could you also explain duty time regulations for last positioning DHC.
      There are no established limits for DHC, the time on DHC is duty, not rest, and all duty time is applied towards the cumulative limitations in ORO.FTL.210(a).
      It is not permitted to exceed the cumulative limits while on FDP, Airport Standby/Standby or Reserve, but they may be exceeded while on DHC.
      The rest requirements that follow any duty, including DHC must provide a minimum rest period of 10:00 away from base / 12:00 at base, or the length of the duty period, whichever is greater.

      Company regulated pick up time from hotel to airport is 1h 40min before take-off(1915z).
      Acft landing at 2000z at homebase. Normal reporting time at homebase is 1h before t/off.

      What is now my total ‘DHC’ duty time on the way to homebase?
      Duty time begins when you arrive at the airport, so for a 1915z departure, you should arrive no later than 1815z, the duty ends upon arrival at home base 2000z for 1:45 elapsed duty time.

      /Garret

      Like

  6. Hello,
    My question is :
    regarding disruptive schedule , what defines the a early type and the a late type .Is it possible a schedule to be calculated based on both types at the same time?
    A company perform a flight schedule based on what type ? Who defines that?
    For example a crew that performs in LT as follows:
    day off –day 1 duty start 15:00 ends 2300 , day 2 the duty starts 1500 ends 2325, day 4 duty start 0625 ends 11:00 and day 5 duty starts 0700 ends 1100 day off
    The crew performs 2 duties with late finish and 2 duties with early start??

    Like

    1. Your local CAA is required under:

      ARO.OPS.230 Determination of disruptive schedules.

      For the purpose of flight time limitations, the competent authority shall determine, in accordance with the definitions of “early type” and “late type” of disruptive schedules in point ORO.FTL.105 of Annex III, which of those two types of disruptive schedules shall apply to all CAT operators under its oversight.

      Your airline needs to contact the CAA.

      Like

  7. Hello
    I have a question, our company schedule our roster in this way 5 or 6 days with only 2 sector in home base where the duty finish start at 1840 lt and finish at 2310 lt, in my opinion is legal (if it is not let me know), but after the last days how many hours of rest I need before I will start another row of 5/6 day with two sector with a disruptive schedule with start of duty at 0545 lt? Because sometimes they schedule 0601 lt just to avoid distruttive schedule

    Thanks a lot

    Like

  8. Dear all I have a few doubts regarding acclimatised, I totally understand the concept but no how to apply it . So for example if I do take a long haul flight crossing 6 time zones , lets say Departing from 1300 LT CDG arriving YYZ 1620lt . When can I report again ? What about if do I go beyond 8 times zones ? How do I calculate my total rest period and when am I acclimatised ? Can I take a flight after being acclimatised using the same MAX FDP as per FTL100? Or does it imply any reduction on my max FDP . The table is confusing I don’t get that about :Time elapsed since reporting at reference time < 48 48 – 71:59 72 – 95:59 96 – 119:59
    Thanks in advance

    Like

  9. Hi Garret,
    A question regarding GM2 CS FTL.1.235(b)(3) Additional rest to compensate for time zone differences.
    Is the additional local nights rest at home base required even when never acclimatised to the time zone at outstation? For example if operating CPH-BKK (6 hour time difference) and reporting again for return flight BKK-CPH within 47 h 59 mins from first reporting at CPH (state B).

    Like

    1. The minimum rest period away from base following a FDP which involves a time zone difference of 4 hours or more is 14:00 or the length of the preceding duty period.
      This can be found in CS FTL.1.235 (b)(ii):
      (ii) Away from home base, if an FDP involves a 4-hour time difference or more, the minimum rest following that FDP is at least as long as
      the preceding duty period, or 14 hours, whichever is greater. By way of derogation from point (b)(3)(i) and only once between 2
      recurrent extended recovery rest periods as specified in ORO.FTL.235(d), the minimum rest provided under this point (b)(3)(ii) may also
      apply to home base if the operator provides suitable accommodation to the crew member.

      So no local nights rest is sepcifically required.

      The Guidance material provision you are citing (GM2 CS FTL.1.235(b)(3)) is for rest upon return to home base.

      /Garret

      Like

      1. Thanks Garret! I can see that my question wasnt complete. What I wanted to ask was if the local nights at home base (CPH) in GM2 CS FTL.1.235(b)(3) are needed after a rotation as the described (operated fully acclimatised to home base time)?

        Like

  10. Hi Garret, another question in addition to one above on the same topic (GM2 CS FTL. 1. 235 (b)(3). It is clear that the number of local nights in the table should be at home base. But does the “Time elapsed (h) since reporting for the first FDP in a rotation involving at least 4-hour time difference to the reference time” stop counting when returning to original reference time zone or when back at home base?

    Day 1 Positioning LGW-CPH 11.15-13.50 utc
    Day 2 CPH-BKK (FDP) 08:45-22.55 utc
    Day 3 Rest BKK
    Day 3 BKK-CPH (FDP) 05.20 -20.20 utc
    Day 4 Positioning CPH-LGW, 15.05-17.55 utc

    LGW is utc +0
    BKK is utc +7
    CPH is utc +1

    Time from reporting for first FDP in CPH to check out at CPH is within the 48-72 hour range which would give 2 local nights starting when returning to home base (LGW). But from first FDP to check out at Home Base is within the 72-96 hours range which require 3 local nights. Which one is correct?

    Like

    1. EASA answered a similar question in it FAQ documny from July-2018:

      70. Rest compensation for time zone differences CS FTL.1.235(b)(3)(i)

      How should we count the time elapsed (h) since reporting for the first FDP in a rotation involving at least 4 hour time difference to the reference time?

      Elapsed time (h) should be counted from the first FDP including at least 4 hour time difference to the reference time, as the rest compensation for time zone differences is given when the crew becomes affected by the time zone differences.

      In your example, the first FDP (LGW-CPH) simply change TZ by 1:00, so the Ref Time at the start of the 2nd FDP is CPH. The 2nd FDP is also the first FDP that contains a TZ difference of 4:00 or more, so the “clock starts at report in CPH 8:45 utc day 2. the clock ends upon return to home base at 17:55 utc day 4, so the total elapsed time is 57:10; whereby the CM will be required to have a rest period with 2 local nights rest (LNR).
      To have 2 LNR this means the CM must have a rest period starting at 17:55 utc day 4 to 06:00 utc day 6 – a 36:05 duration.
      However, should the next series of FDP be in the opposite direction with at TZ difference of 4:00 or more, then the rest at base must contain 3 LNR for a duration of 60:05.
      Eastward-Westward Transition.

      Finally, I somewhat disagree with the EASA.
      I believe that it should be from Report at home base (day 1 11:15 utc).
      This brings the span to 78:40, thereby requiring 3 LNR.
      My reasoning is if we look at GM CS ft.1.235(b)(3) we have:
      TIME ELAPSED SINCE REPORTING

      The time elapsed since reporting for a rotation involving at least a 4-hour time difference to the reference time stops counting when the crew member returns to his/her home base for a rest period during which the operator is no longer responsible for the accommodation of the crew member.

      I believe you should discuss with your Airline and local CAA, as GM, CS are not requirements like ORO.FTL, (and certainly FAQ and my opinion are not), however they are interpretations and should be viewed as such.

      /Garret

      Like

  11. Hi Garret,

    I have question about Rest Period at Home Base after rotation invovling 7-hour time difference.

    The roster like this:

    Day 1: SGN-LHR 17:25-07:15 UTC Day 2
    Day 2: Stay LHR
    Day 3: LHR-HAN 10:10-21:50 UTC

    Time elapsed: 77 hours 40 minutes

    Day 4: OFF (01st Local Night Rest)
    Day 5: SGN-HAN-SGN 10:00 – 15:00 LT (02nd Local Night Rest)
    Day 6: SGN-HUI-SGN 08:00 – 12:00 LT (03rd Local Night Rest)

    Is the Rest in Roster above Legal and Complied to CS FLT.1.235(b)(3)(i) ?

    Like

    1. Manh,
      There seems to be a couple of problems in the situation your are presenting:
      Day 3: ends in HAN while Day 5: starts in SGN. (I will assume you meant SGN)

      The second problem is the elapsed time: 77:40 seems incorrect, 17:25 day 1 UTC-> 21:50 day 3 UTC equates to 52:25 ( I will use 52:25)

      The rest period starting at 21:50 UTC day 3 will end with the duty starting at 10:00 UTC day 5, will have a duration of 36:10.
      The local times for the rest is 4:50 (SGN LT) day 4 to 17:00 (SGN LT) day 5, so only 1 Local Nights Rest is provided during this rest period.

      CS FTL.1.235 (b)(3)(i).
      (3) Time zone differences are compensated by additional rest, as follows:
      (i) At home base, if a rotation involves a 4 hour time difference or more, the minimum rest is as specified in the following table.

      Minimum local nights of rest at home base to compensate for time zone differences

      The Table in CS FTL.1.235(b)(3)(i) is applied when a CM has had a time zone difference during the rotation of 4:00 or more.
      The time zone difference between SGN and LHR is 7:00 (winter) and 6:00 (summer)

      Requires than when a CM has been away from base (52:25) for between 48:00 and 71:59 (inclusive), the minimum number of Local Nights (Column 2 in the table).

      Rest that must be assigned before the next FDP is 2 (summer) or 3 (winter), see rows 1 and 2 respectively in the table.

      With the rest starting at 04:50 day 4 SGN LT, the earliest the FDP may start is 06:00 day 6 (SGN LT) = 23:00 day 5 UTC (summer) or 06:00 day 7 (SGN LT) = 23:00 day 6 UTC (winter).

      The situation presented appears to not be in compliance with EASA FTL’s.
      /Garret

      Like

  12. Hi, Garret

    After all sorts of possible roster combinations, here is one more (all times are local and acclimatized):

    Day 1: C/in 1300 Homebase
    Office work
    C/out 1500 Homebase

    Day 2: C/in 0555 Homebase
    4 sectors
    C/out 1425 (outbase and hotel accommodation)

    Day 3: C/in 0345 Outbase
    1 sector
    C/out 0640 Homebase
    Rest at home
    C/in 2140 Homebase
    1 sector
    C/out 0035 (already day4 – outbase and hotel)

    Day 4: C/in 1330 Outbase
    positioning + 2 sectors
    C/out 2235 Homebase

    Day 5: C/in 1130 Homebase
    4 sectors
    C/out 2230 Homebase

    I find this very disruptive.
    From a fatigue point of view, I think the second duty on a Day 3 is critical. Is this legal with all those transitions, although I can remember your post:
    ”A schedule is considered as disruptive if a transition exists from a late duty to an early start duty, or if a transition exists from a night duty to an early start duty.”

    Thank you for the short explanation.
    Sincerely, Joze

    Like

    1. Hi, your concerns raise a very good question.

      If we look at the duties on day 3 and 4:
      Day 3: C/in 0345 Outbase
      1 sector
      C/out 0640 Homebase
      Rest at home
      C/in 2140 Homebase
      1 sector
      C/out 0035 (already day4 – outbase and hotel)

      The first duty is clearly a Night Duty as it falls within the definition in ORO.FTL.105:
      night duty” means a duty period encroaching any portion of the period between 02:00 and 04:59 in the time zone to which the crew is acclimatised;

      The second duty is clearly a Late Finish Duty as it falls into the definition for “Late Type” in ORO.FTL.105 (8)(b)(ii):
      for “late finish” a duty period finishing in the period between 00:00 and 01:59 in the time zone to which a crew member is acclimatised;

      Given that there exists no transition from a Night Duty to Early Start the constraints under CS FTL.1.235 (a)(1) need not be applied:
      If a transition from a late finish/night duty to an early start is planned at home base, the rest period between the 2 FDPs includes 1 local night.

      However, ORO.FTL.110 (e) requires:
      allocate duty patterns which avoid practices that cause a serious disruption of an established sleep/work pattern, such as alternating day/night duties;

      Ideally, humans should be limited to 14:00 work days followed by 10:00 rest. The rest should be given and taken on a regular frequency as practical as possible to permit an 8:00 sleep opportunity. Some regulators (ANAC (Brazil) and CASA (Australia)) define disruptive schedules differently. The changing of a crew members daily report time should limited as much as possible to no more than 4:00 +/- in any 24:00 period.

      EASA has recently performed a study concerning Night Duty Periods and recently published the results. It is expected that some changes to ORO.FTL may be made based upon the results.
      https://www.easa.europa.eu/newsroom-and-events/press-releases/easa-report-%E2%80%9Ceffectiveness-flight-time-limitation%E2%80%9D-recommends

      While understanding that the practices are legal under the regulations (as I have interpreted), I suggest an open and honest discussion with your airline to address your concerns.

      /Garret

      Like

Leave a Comment

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.