224 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.645 

(c) No person may release a nontur-

bine or turbo-propeller-powered air-
plane to an airport for which an alter-
nate is not specified under § 121.623(b), 
unless it has enough fuel, considering 
wind and other weather conditions ex-
pected, to fly to that airport and there-
after 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] 

§ 121.645

Fuel supply: Turbine-engine 

powered airplanes, other than 
turbo propeller: Flag and supple-
mental operations. 

(a) Any flag operation within the 48 

contiguous United States and the Dis-
trict of Columbia may use the fuel re-
quirements of § 121.639. 

(b) For any certificate holder con-

ducting flag or supplemental oper-
ations outside the 48 contiguous United 
States and the District of Columbia, 
unless authorized by the Administrator 
in the operations specifications, no per-
son may release for flight or takeoff a 
turbine-engine powered airplane (other 
than a turbo-propeller powered air-
plane) 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 al-
ternate is required; and 

(4) After that, to fly for 30 minutes at 

holding speed at 1,500 feet above the al-
ternate airport (or the destination air-
port if no alternate is required) under 
standard temperature conditions. 

(c) No person may release a turbine- 

engine powered airplane (other than a 
turbo-propeller airplane) to an airport 
for which an alternate is not specified 
under § 121.621(a)(2) or § 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 cer-
tificate holder conducting flag or sup-
plemental 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 nec-
essary on a particular route in the in-
terest 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 re-
quirements of § 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] 

§ 121.646

En-route fuel supply: flag and 

supplemental operations. 

(a) No person may dispatch or release 

for flight a turbine-engine powered air-
plane 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 § 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 alti-

tude in compliance with the oxygen 
supply requirements of § 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, con-
sidering wind and other weather condi-
tions expected, it has the fuel other-
wise required by this part and enough 
fuel to satisfy each of the following re-
quirements: 

(1) Fuel to fly to an ETOPS Alternate 

Airport. 

(i) Fuel to account for rapid decom-

pression and engine failure. The air-
plane must carry the greater of the fol-
lowing amounts of fuel: 

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