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14 CFR Part 121.505 applies to Supplemental Operations, not Domestic (I assume since it's Mesa, the operations are Domestic). As stated above, there is no "16-hour" rule stated in Part 121.471.Originally Posted by kronan
...There is a 16 hour duty day that your bud may or may not have busted. (121.505 (b) No pilot of an airplane that has a crew of two pilots may be on duty for more than 16 hours during any 24 consecutive hours.)...
In fact, when you get done with the math, the maximum duty day may be 15 hours, not 16. If you are scheduled to fly more than nine hours in a rolling 24 hour period, your rest may only be reduced to a minimum of nine hours, not eight - Part 121.471(c)(3). Example:
Day One
Show time 14:00
Leg 1 ABC - DEF 15:00 17:30 2:30
Leg 2 DEF - ABC 18:00 20:30 2:30
Leg 3 ABC - XYZ 21:30 22:30 1:00
Off Duty at 22:45
Total flight time: 6:00
Day Two
On Duty at 7:45
Leg 4 XYZ - ABC 8:30 9:30 1:00
Leg 5 ABC - GHI 10:00 12:30 2:30
Off Duty at 12:45
Total flight time: 3:30
In this scenario the pilot is scheduled/flew a total of 9:30 within a 24 hour period. He was off duty at 22:45 the first night and returned at 7:45 the next morning. He received nine hours of reduced rest which is the minimum allowed in this scenario, not eight. This is legal - again 121.471(c)(3). He must now be given a rest period of at least 12 hours and that rest period must begin by 22:45 on day two (...a rest period of at least 12 hours that must begin no later than 24 hours after the commencement of the reduced rest period (in this case, 22:45 day one)). Since the compensatory rest began at 12:45 day two, he's fine.
Scheduled deadhead is not rest. Part 121.471(f) states: "time spent in transportation, not local in character, that a certificate holder requires of a flight crewmember and provides to transport the crewmember to an airport at which he is to serve on a flight as a crewmember, or from an airport at which he was relieved from duty to return to his home station, is not considered part of a rest period." I have bolded the two sections that apply here. The bolded parts mean "deadheading."
However, back to 121.471(c)(3) (or (c)(2) or (c)(1) or 121.471(b) for that matter). Remember the rest must begin no later than 24 hours after the start of the previous rest. In the scenario above, as long as the company can schedule to deadhead him to his home base and off duty/on rest by 22:45 of day two, and the rest is of the correct length before he has to return to duty, he's legal. But if he was scheduled to start a two hour deadhead at 20:46 on day two, he would not be legal, because he must be on rest by 22:45 of day two.
So it really does depend on when he started and what hours he flew.