135.267 Flight time limitations and rest requirements: Unscheduled
one- and two-pilot crews.
(a) No certificate holder may assign any flight crewmember, and no flight
crewmember may accept an assignment, for flight time as a member of a one-
or two-pilot crew if that crewmember's total flight time in all commercial
flying will exceed—
(1) 500 hours in any calendar quarter.
(2) 800 hours in any two consecutive calendar quarters.
(3) 1,400 hours in any calendar year.
(b) Except as provided in paragraph (c) of this section, during any 24
consecutive hours the total flight time of the assigned flight when added to
any other commercial flying by that flight crewmember may not exceed—
(1) 8 hours for a flight crew consisting of one pilot; or
(2) 10 hours for a flight crew consisting of two pilots qualified under
this part for the operation being conducted.
(c) A flight crewmember's flight time may exceed the flight time limits
of paragraph (b) of this section if the assigned flight time occurs during a
regularly assigned duty period of no more than 14 hours and—
(1) If this duty period is immediately preceded by and followed by a
required rest period of at least 10 consecutive hours of rest;
(2) If flight time is assigned during this period, that total flight time
when added to any other commercial flying by the flight crewmember may not
(i) 8 hours for a flight crew consisting of one pilot; or
(ii) 10 hours for a flight crew consisting of two pilots; and
(3) If the combined duty and rest periods equal 24 hours.
(d) Each assignment under paragraph (b) of this section must provide for
at least 10 consecutive hours of rest during the 24-hour period that
precedes the planned completion time of the assignment.
(e) When a flight crewmember has exceeded the daily flight time
limitations in this section, because of circumstances beyond the control of
the certificate holder or flight crewmember (such as adverse weather
conditions), that flight crewmember must have a rest period before being
assigned or accepting an assignment for flight time of at least—
(1) 11 consecutive hours of rest if the flight time limitation is
exceeded by not more than 30 minutes;
(2) 12 consecutive hours of rest if the flight time limitation is
exceeded by more than 30 minutes, but not more than 60 minutes; and
(3) 16 consecutive hours of rest if the flight time limitation is
exceeded by more than 60 minutes.
(f) The certificate holder must provide each flight crewmember at least
13 rest periods of at least 24 consecutive hours each in each calendar