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194 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.519 

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 
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) duty any scheduled duty period, 
he must be given at least 16 hours for 
rest on the ground after completing the 
last flight scheduled for that scheduled 
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] 

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