237
Federal Aviation Administration, DOT
§ 121.639
needed to fly to that airport (at the ap-
proved one-engine inoperative cruise
speed under standard conditions in still
air) would exceed the approved time for
the airplane’s most limiting ETOPS
Significant System (including the air-
plane’s most limiting fire suppression
system time for those cargo and bag-
gage compartments required by regula-
tion to have fire-suppression systems)
minus 15 minutes.
(b) For ETOPS beyond 180 minutes,
no person may list an airport as an
ETOPS Alternate Airport in a dispatch
or flight release if the time needed to
fly to that airport:
(1) at the all engine operating cruise
speed, corrected for wind and tempera-
ture, exceeds the airplane’s most lim-
iting fire suppression system time
minus 15 minutes for those cargo and
baggage compartments required by reg-
ulation to have fire suppression sys-
tems (except as provided in paragraph
(c) of this section), or
(2) at the one-engine-inoperative
cruise speed, corrected for wind and
temperature, exceeds the airplane’s
most limiting ETOPS Significant Sys-
tem time (other than the airplane’s
most limiting fire suppression system
time minus 15 minutes for those cargo
and baggage compartments required by
regulation to have fire-suppression sys-
tems).
(c) For turbine-engine powered air-
planes with more than two engines, the
certificate holder need not meet para-
graph (b)(1) of this section until Feb-
ruary 15, 2013.
[Doc. No. FAA–2002–6717, 72 FR 1882, Jan. 16,
2007]
§ 121.635 Dispatch to and from refuel-
ing or provisional airports: Domes-
tic and flag operations.
No person may dispatch an airplane
to or from a refueling or provisional
airport except in accordance with the
requirements of this part applicable to
dispatch from regular airports and un-
less that airport meets the require-
ments of this part applicable to regular
airports.
[Doc. No. 16383, 43 FR 22649, May 25, 1978]
§ 121.637 Takeoffs from unlisted and
alternate airports: Domestic and
flag operations.
(a) No pilot may takeoff an airplane
from an airport that is not listed in the
operations specifications unless—
(1) The airport and related facilities
are adequate for the operation of the
airplane;
(2) He can comply with the applicable
airplane operating limitations;
(3) The airplane has been dispatched
according to dispatching rules applica-
ble to operation from an approved air-
port; and
(4) The weather conditions at that
airport are equal to or better than the
following:
(i)
Airports in the United States.
The
weather minimums for takeoff pre-
scribed in part 97 of this chapter; or
where minimums are not prescribed for
the airport, 800–2, 900–1
1
⁄
2
, or 1,000–1.
(ii)
Airports outside the United States.
The weather minimums for takeoff pre-
scribed or approved by the government
of the country in which the airport is
located; or where minimums are not
prescribed or approved for the airport,
800–2, 900–1
1
⁄
2
, or 1,000–1.
(b) No pilot may take off from an al-
ternate airport unless the weather con-
ditions are at least equal to the mini-
mums prescribed in the certificate
holder’s operations specifications for
alternate airports.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121–33, 32 FR 13912, Oct. 6,
1967; Amdt. 121–253, 61 FR 2615, Jan. 26, 1996]
§ 121.639 Fuel supply: All domestic op-
erations.
No person may dispatch or take off
an airplane unless it has enough fuel—
(a) To fly to the airport to which it is
dispatched;
(b) Thereafter, to fly to and land at
the most distant alternate airport
(where required) for the airport to
which dispatched; and
(c) Thereafter, to fly for 45 minutes
at normal cruising fuel consumption
or, for certificate holders who are au-
thorized to conduct day VFR oper-
ations in their operations specifica-
tions and who are operating non-
transport category airplanes type cer-
tificated after December 31, 1964, to fly
238
14 CFR Ch. I (1–1–24 Edition)
§ 121.641
for 30 minutes at normal cruising fuel
consumption for day VFR operations.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121–251, 60 FR 65935, Dec.
20, 1995]
§ 121.641 Fuel supply: Nonturbine and
turbo-propeller-powered airplanes:
Flag operations.
(a) No person may dispatch or take
off a nonturbine or turbo-propeller-
powered airplane unless, considering
the wind and other weather conditions
expected, it has enough fuel—
(1) To fly to and land at the airport
to which it is dispatched;
(2) Thereafter, to fly to and land at
the most distant alternate airport
specified in the dispatch release; and
(3) Thereafter, to fly for 30 minutes
plus 15 percent of the total time re-
quired to fly at normal cruising fuel
consumption to the airports specified
in paragraphs (a) (1) and (2) of this sec-
tion or to fly for 90 minutes at normal
cruising fuel consumption, whichever
is less.
(b) No person may dispatch a nontur-
bine or turbo-propeller-powered air-
plane to an airport for which an alter-
nate is not specified under
§ 121.621(a)(2), unless it has enough fuel,
considering wind and forecast weather
conditions, to fly to that airport and
thereafter to fly for three hours at nor-
mal cruising fuel consumption.
§ 121.643 Fuel supply: Nonturbine and
turbo-propeller-powered airplanes:
Supplemental operations.
(a) Except as provided in paragraph
(b) of this section, no person may re-
lease for flight or takeoff a nonturbine
or turbo-propeller-powered airplane un-
less, considering the 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) Thereafter, to fly to and land at
the most distant alternate airport
specified in the flight release; and
(3) Thereafter, to fly for 45 minutes
at normal cruising fuel consumption
or, for certificate holders who are au-
thorized to conduct day VFR oper-
ations in their operations specifica-
tions and who are operating non-
transport category airplanes type cer-
tificated after December 31, 1964, to fly
for 30 minutes at normal cruising fuel
consumption for day VFR operations.
(b) If the airplane is released for any
flight other than from one point in the
contiguous United States to another
point in the contiguous United States,
it must carry enough fuel to meet the
requirements of paragraphs (a) (1) and
(2) of this section and thereafter fly for
30 minutes plus 15 percent of the total
time required to fly at normal cruising
fuel consumption to the airports speci-
fied in paragraphs (a) (1) and (2) of this
section, or to fly for 90 minutes at nor-
mal cruising fuel consumption, which-
ever is less.
(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;