222
14 CFR Ch. I (1–1–19 Edition)
§ 121.633
in conditions that have occurred since
dispatch.
(d) If paragraph (c)(1) of this section
cannot be met for a specific airport,
the dispatch or flight release may be
amended to add an ETOPS Alternate
Airport within the maximum ETOPS
diversion time that could be authorized
for that flight with weather conditions
at or above operating minima.
(e) Before the ETOPS Entry Point,
the pilot in command for a supple-
mental operator or a dispatcher for a
flag operator must use company com-
munications to update the flight plan
if needed because of a re-evaluation of
aircraft system capabilities.
(f) No person may change an original
destination or alternate airport that is
specified in the original dispatch or
flight release to another airport while
the aircraft is en route unless the other
airport is authorized for that type of
aircraft and the appropriate require-
ments of §§ 121.593 through 121.661 and
121.173 are met at the time of redis-
patch or amendment of the flight re-
lease.
(g) Each person who amends a dis-
patch or flight release en route shall
record that amendment.
[Doc. No. 628, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121–65, 35 FR 12709, Aug.
11, 1970; Amdt. 121–329, 72 FR 1881, Jan. 16,
2007]
§ 121.633
Considering time-limited sys-
tems in planning ETOPS alternates.
(a) For ETOPS up to and including
180 minutes, no person may list an air-
port as an ETOPS Alternate Airport in
a dispatch or flight release if the time
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:
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