26 

14 CFR Ch. I (1–1–24 Edition) 

§ 117.25 

(c) No certificate holder may sched-

ule and no flightcrew member may ac-
cept an assignment if the flightcrew 
member’s total Flight Duty Period will 
exceed: 

(1) 60 flight duty period hours in any 

168 consecutive hours or 

(2) 190 flight duty period hours in any 

672 consecutive hours. 

[Doc. No. FAA–2009–1093, 77 FR 398, Jan. 4, 
2012; Amdt. 117–1A, 77 FR 28764, May 16, 2012; 
Amdt. 117–1, 78 FR 69288, Nov. 19, 2013] 

§ 117.25 Rest period. 

(a) No certificate holder may assign 

and no flightcrew member may accept 
assignment to any reserve or duty with 
the certificate holder during any re-
quired rest period. 

(b) Before beginning any reserve or 

flight duty period a flightcrew member 
must be given at least 30 consecutive 
hours free from all duty within the 
past 168 consecutive hour period. 

(c) If a flightcrew member operating 

in a new theater has received 36 con-
secutive hours of rest, that flightcrew 
member is acclimated and the rest pe-
riod meets the requirements of para-
graph (b) of this section. 

(d) A flightcrew member must be 

given a minimum of 56 consecutive 
hours rest upon return to home base if 
the flightcrew member: (1) Travels 
more than 60

° 

longitude during a flight 

duty period or a series of flight duty 
period, and (2) is away from home base 
for more than 168 consecutive hours 
during this travel. The 56 hours of rest 
specified in this section must encom-
pass three physiological nights’ rest 
based on local time. 

(e) No certificate holder may sched-

ule and no flightcrew member may ac-
cept an assignment for any reserve or 
flight duty period unless the flightcrew 
member is given a rest period of at 
least 10 consecutive hours immediately 
before beginning the reserve or flight 
duty period measured from the time 
the flightcrew member is released from 
duty. The 10 hour rest period must pro-
vide the flightcrew member with a 
minimum of 8 uninterrupted hours of 
sleep opportunity. 

(f) If a flightcrew member determines 

that a rest period under paragraph (e) 
of this section will not provide eight 
uninterrupted hours of sleep oppor-

tunity, the flightcrew member must 
notify the certificate holder. The 
flightcrew member cannot report for 
the assigned flight duty period until he 
or she receives a rest period specified 
in paragraph (e) of this section. 

(g) If a flightcrew member engaged in 

deadhead transportation exceeds the 
applicable flight duty period in Table B 
of this part, the flightcrew member 
must be given a rest period equal to 
the length of the deadhead transpor-
tation but not less than the required 
rest in paragraph (e) of this section be-
fore beginning a flight duty period. 

[Doc. No. FAA–2009–1093, 77 FR 398, Jan. 4, 
2012; Amdt. 117–1A, 77 FR 28764, May 16, 2012; 
Amdt. 117–1, 78 FR 8362, Feb. 6, 2013] 

§ 117.27 Consecutive nighttime oper-

ations. 

A certificate holder may schedule 

and a flightcrew member may accept 
up to five consecutive flight duty peri-
ods that infringe on the window of cir-
cadian low if the certificate holder pro-
vides the flightcrew member with an 
opportunity to rest in a suitable ac-
commodation during each of the con-
secutive nighttime flight duty periods. 
The rest opportunity must be at least 2 
hours, measured from the time that 
the flightcrew member reaches the 
suitable accommodation, and must 
comply with the conditions specified in 
§ 117.15(a), (c), (d), and (e). Otherwise, 
no certificate holder may schedule and 
no flightcrew member may accept 
more than three consecutive flight 
duty periods that infringe on the win-
dow of circadian low. For purposes of 
this section, any split duty rest that is 
provided in accordance with § 117.15 
counts as part of a flight duty period. 

§ 117.29 Emergency and government 

sponsored operations. 

(a) This section applies to operations 

conducted pursuant to contracts with 
the U.S. Government and operations 
conducted pursuant to a deviation 
under § 119.57 of this chapter that can-
not otherwise be conducted under this 
part because of circumstances that 
could prevent flightcrew members from 
being relieved by another crew or safe-
ly provided with the rest required 
under § 117.25 at the end of the applica-
ble flight duty period.