208
14 CFR Ch. I (1–1–24 Edition)
§ 121.507
§ 121.507 Flight time limitations: Three
pilot crews: airplanes.
(a) No certificate holder conducting
supplemental operations may schedule
a pilot—
(1) For flight deck duty in an air-
plane that has a crew of three pilots for
more than eight hours in any 24 con-
secutive hours; or
(2) To be aloft in an airplane that has
a crew of three pilot for more than 12
hours in any 24 consecutive hours.
(b) No pilot of an airplane that has a
crew of three pilots may be on duty for
more than 18 hours in any 24 consecu-
tive hours.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964; 30
FR 3639, Mar. 19, 1965, as amended by Amdt.
121–253, 61 FR 2613, Jan. 26, 1996]
§ 121.509 Flight time limitations: Four
pilot crews: airplanes.
(a) No certificate holder conducting
supplemental operations may schedule
a pilot—
(1) For flight deck duty in an air-
plane that has a crew of four pilots for
more than eight hours in any 24 con-
secutive hours; or
(2) To be aloft in an airplane that has
a crew of four pilots for more than 16
hours in any 24 consecutive hours.
(b) No pilot of an airplane that has a
crew of four pilots may be on duty for
more than 20 hours in any 24 consecu-
tive hours.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964; 30
FR 3639, Mar. 19, 1965, as amended by Amdt.
121–253, 61 FR 2613, Jan. 26, 1996]
§ 121.511 Flight time limitations:
Flight engineers: airplanes.
(a) In any operation in which one
flight engineer is serving the flight
time limitations in §§ 121.503 and 121.505
apply to that flight engineer.
(b) In any operation in which more
than one flight engineer is serving and
the flight crew contains more than two
pilots the flight time limitations in
§ 121.509 apply in place of those in
§ 121.505.
§ 121.513 Flight time limitations: Over-
seas and international operations:
airplanes.
In place of the flight time limita-
tions in §§ 121.503 through 121.511, a cer-
tificate holder conducting supple-
mental operations may elect to comply
with the flight time limitations of
§§ 121.515 and 121.521 through 121.525 for
operations conducted—
(a) Between a place in the 48 contig-
uous States and the District of Colum-
bia, or Alaska, and any place outside
thereof;
(b) Between any two places outside
the 48 contiguous States, the District
of Columbia, and Alaska; or
(c) Between two places within the
State of Alaska or the State of Hawaii.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964; 30
FR 3639, Mar. 19, 1965, as amended by Amdt.
121–253, 61 FR 2613, Jan. 26, 1996]
§ 121.515 Flight time limitations: All
airmen: airplanes.
No airman may be aloft as a flight
crewmember more than 1,000 hours in
any 12-calendar-month period.
§ 121.517 Flight time limitations: Other
commercial flying: airplanes.
No airman who is employed by a cer-
tificate holder conducting supple-
mental operations may do any other
commercial flying, if that commercial
flying plus his flying in operations
under this part will exceed any flight
time limitation in this part.
[Doc. No. 28154, 61 FR 2613, Jan. 26, 1996]
§ 121.519 Flight time limitations:
Deadhead transportation: airplanes.
Time spent by an airman in deadhead
transportation to or from a duty as-
signment is not considered to be part
of any rest period.
§ 121.521 Flight time limitations: Crew
of two pilots and one additional air-
man as required.
(a) No certificate holder conducting
supplemental operations may schedule
an airman to be aloft as a member of
the flight crew in an airplane that has
a crew of two pilots and at least one
additional flight crewmember for more
than 12 hours during any 24 consecutive
hours.
(b) If an airman has been aloft as a
member of a flight crew for 20 or more
hours during any 48 consecutive hours
or 24 or more hours during any 72 con-
secutive hours, he must be given at
least 18 hours of rest before being as-
signed to any duty with the certificate
209
Federal Aviation Administration, DOT
§ 121.525
holder. In any case, he must be relieved
of all duty for at least 24 consecutive
hours during any seven consecutive
days.
(c) No airman may be aloft as a flight
crewmember more than—
(1) 120 hours during any 30 consecu-
tive days; or
(2) 300 hours during any 90 consecu-
tive days.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964, as
amended by Amdt. 121–17, 31 FR 1147, Jan. 28,
1966; Amdt. 121–253, 61 FR 2613, Jan. 26, 1996]
§ 121.523 Flight time limitations: Crew
of three or more pilots and addi-
tional airmen as required.
(a) No certificate holder conducting
supplemental operations may schedule
an airman for flight deck duty as a
flight engineer, or navigator in a crew
of three or more pilots and additional
airmen for a total of more than 12
hours during any 24 consecutive hours.
(b) Each certificate holder con-
ducting supplemental operations shall
schedule its flight hours to provide
adequate rest periods on the ground for
each airman who is away from his prin-
cipal operations base. It shall also pro-
vide adequate sleeping quarters on the
airplane whenever an airman is sched-
uled to be aloft as a flight crewmember
for more than 12 hours during any 24
consecutive hours.
(c) No certificate holder conducting
supplemental operations may schedule
any flight crewmember to be on contin-
uous duty for more than 30 hours. Such
a crewmember is considered to be on
continuous duty from the time he re-
ports for duty until the time he is re-
leased from duty for a rest period of at
least 10 hours on the ground. If a flight
crewmember is on continuous duty for
more than 24 hours (whether scheduled
or not) during any scheduled duty pe-
riod, he must be given at least 16 hours
for rest on the ground after completing
the last flight scheduled for that sched-
uled duty period before being assigned
any further flight duty.
(d) If a flight crewmember is required
to engage in deadhead transportation
for more than four hours before begin-
ning flight duty, one half of the time
spent in deadhead transportation must
be treated as duty time for the purpose
of complying with duty time limita-
tions, unless he is given at least 10
hours of rest on the ground before
being assigned to flight duty.
(e) Each certificate holder con-
ducting supplemental operations shall
give each airman, upon return to his
operations base from any flight or se-
ries of flights, a rest period that is at
least twice the total number of hours
he was aloft as a flight crewmember
since the last rest period at his base,
before assigning him to any further
duty. If the required rest period is
more than seven days, that part of the
rest period that is more than seven
days may be given at any time before
the pilot is again scheduled for flight
duty.
(f) No airman may be aloft as a flight
crewmember for more than 350 hours in
any 90 consecutive days.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964; 30
FR 3639, Mar. 19, 1965, as amended by Amdt.
121–253, 61 FR 2613, Jan. 26, 1996; Amdt. 121–
387, 87 FR 75846, Dec. 9, 2022]
§ 121.525 Flight time limitations: Pilots
serving in more than one kind of
flight crew.
(a) This section applies to each pilot
assigned during any 30 consecutive
days to more than one type of flight
crew.
(b) The flight time limitations for a
pilot who is scheduled for duty aloft for
more than 20 hours in two-pilot crews
in 30 consecutive days, or whose assign-
ment in such a crew is interrupted
more than once in any 30 consecutive
days by assignment to a crew of two or
more pilots and an additional flight
crewmember, are those listed in
§§ 121.503 through 121.509, as appro-
priate.
(c) Except for a pilot covered by para-
graph (b) of this section, the flight
time limitations for a pilot scheduled
for duty aloft for more than 20 hours in
two-pilot and additional flight crew-
member crews in 30 consecutive days or
whose assignment in such a crew is in-
terrupted more than once in any 30
consecutive days by assignment to a
crew consisting of three pilots and an
additional flight crewmember, are
those set forth in § 121.521.
(d) The flight time limitations for a
pilot to whom paragraphs (b) and (c) of
this section do not apply, and who is