Section 117.27

14 CFR Ch. I (1-1-19 Edition)
ods that infringe on the window of circadian low if the certificate holder provides the flightcrew member with an
opportunity to rest in a suitable accommodation during each of the consecutive 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
Section 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 window of circadian low. For purposes of
this section, any split duty rest that is
provided in accordance with Section 117.15
counts as part of a flight duty period.

(c) If a flightcrew member operating
in a new theater has received 36 consecutive hours of rest, that flightcrew
member is acclimated and the rest period meets the requirements of paragraph (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 60Section 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 encompass three physiological nights- rest
based on local time.
(e) No certificate holder may schedule and no flightcrew member may accept 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 provide 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 opportunity, 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 transportation but not less than the required
rest in paragraph (e) of this section before beginning a flight duty period.

Section 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 Section 119.57 of this chapter that cannot otherwise be conducted under this
part because of circumstances that
could prevent flightcrew members from
being relieved by another crew or safely provided with the rest required
under Section 117.25 at the end of the applicable flight duty period.
(b) The pilot-in-command may determine that the maximum applicable
flight duty period, flight time, and/or
combined flight duty period and reserve availability period limits must be
exceeded to the extent necessary to
allow the flightcrew to fly to the closest destination where they can safely
be relieved from duty by another
flightcrew or can receive the requisite
amount of rest prior to commencing
their next flight duty period.
(c) A flight duty period may not be
extended for an operation conducted
pursuant to a contract with the U.S.
Government if it causes a flightcrew
member to exceed the cumulative
flight time limits in Section 117.23(b) and the
cumulative flight duty period limits in
Section 117.23(c).
(d) The flightcrew shall be given a
rest period immediately after reaching
the destination described in paragraph
(b) of this section equal to the length

[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]

Section 117.27 Consecutive nighttime operations.
A certificate holder may schedule
and a flightcrew member may accept
up to five consecutive flight duty peri-

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