Section 121.645

14 CFR Ch. I (1-1-19 Edition)

(c) No person may release a nonturbine or turbo-propeller-powered airplane to an airport for which an alternate is not specified under Section 121.623(b),
unless it has enough fuel, considering
wind and other weather conditions expected, to fly to that airport and thereafter to fly for three hours at normal
cruising fuel consumption.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121-10, 30 FR 10025, Aug.
12, 1965; Amdt. 121-251, 60 FR 65935, Dec. 20,
1995]

Section 121.645 Fuel supply: Turbine-engine
powered airplanes, other than
turbo propeller: Flag and supplemental operations.
(a) Any flag operation within the 48
contiguous United States and the District of Columbia may use the fuel requirements of Section 121.639.
(b) For any certificate holder conducting flag or supplemental operations outside the 48 contiguous United
States and the District of Columbia,
unless authorized by the Administrator
in the operations specifications, no person may release for flight or takeoff a
turbine-engine powered airplane (other
than a turbo-propeller powered airplane) unless, considering wind and
other weather conditions expected, it
has enough fuel - 
(1) To fly to and land at the airport
to which it is released;
(2) After that, to fly for a period of 10
percent of the total time required to
fly from the airport of departure to,
and land at, the airport to which it was
released;
(3) After that, to fly to and land at
the most distant alternate airport
specified in the flight release, if an alternate is required; and
(4) After that, to fly for 30 minutes at
holding speed at 1,500 feet above the alternate airport (or the destination airport if no alternate is required) under
standard temperature conditions.
(c) No person may release a turbineengine powered airplane (other than a
turbo-propeller airplane) to an airport
for which an alternate is not specified
under Section 121.621(a)(2) or Section 121.623(b) unless
it has enough fuel, considering wind
and other weather conditions expected,
to fly to that airport and thereafter to

fly for at least two hours at normal
cruising fuel consumption.
(d) The Administrator may amend
the operations specifications of a certificate holder conducting flag or supplemental operations to require more
fuel than any of the minimums stated
in paragraph (a) or (b) of this section if
he finds that additional fuel is necessary on a particular route in the interest of safety.
(e) For a supplemental operation
within the 48 contiguous States and
the District of Columbia with a turbine
engine powered airplane the fuel requirements of Section 121.643 apply.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121-10, 30 FR 10025, Aug.
12, 1965; Amdt. 121-144, 43 FR 22649, May 25,
1978; Amdt. 121-253, 61 FR 2615, Jan. 26, 1996]

Section 121.646 En-route fuel supply: flag and
supplemental operations.
(a) No person may dispatch or release
for flight a turbine-engine powered airplane with more than two engines for a
flight more than 90 minutes (with all
engines operating at cruise power)
from an Adequate Airport unless the
following fuel supply requirements are
met:
(1) The airplane has enough fuel to
meet the requirements of Section 121.645(b);
(2) The airplane has enough fuel to
fly to the Adequate Airport - 
(i) Assuming a rapid decompression
at the most critical point;
(ii) Assuming a descent to a safe altitude in compliance with the oxygen
supply requirements of Section 121.333; and
(iii) Considering expected wind and
other weather conditions.
(3) The airplane has enough fuel to
hold for 15 minutes at 1500 feet above
field elevation and conduct a normal
approach and landing.
(b) No person may dispatch or release
for flight an ETOPS flight unless, considering wind and other weather conditions expected, it has the fuel otherwise required by this part and enough
fuel to satisfy each of the following requirements:
(1) Fuel to fly to an ETOPS Alternate
Airport.
(i) Fuel to account for rapid decompression and engine failure. The airplane must carry the greater of the following amounts of fuel:

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