506
14 CFR Ch. I (1–1–24 Edition)
§ 135.387
(3) The operation is authorized by op-
erations specifications.
[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as
amended by Amdt. 135–91, 68 FR 54588, Sept.
17, 2003]
§ 135.387 Large transport category air-
planes: Turbine engine powered:
Landing limitations: Alternate air-
ports.
(a) Except as provided in paragraph
(b) of this section, no person may se-
lect an airport as an alternate airport
for a turbine engine powered large
transport category airplane unless
(based on the assumptions in
§ 135.385(b)) that airplane, at the weight
expected at the time of arrival, can be
brought to a full stop landing within 70
percent of the effective length of the
runway for turbo-propeller-powered
airplanes and 60 percent of the effec-
tive length of the runway for turbojet
airplanes, from a point 50 feet above
the intersection of the obstruction
clearance plane and the runway.
(b) Eligible on-demand operators may
select an airport as an alternate air-
port for a turbine engine powered large
transport category airplane if (based
on the assumptions in § 135.385(f)) that
airplane, at the weight expected at the
time of arrival, can be brought to a full
stop landing within 80 percent of the
effective length of the runway from a
point 50 feet above the intersection of
the obstruction clearance plane and
the runway.
[Doc. No. FAA–2001–10047, 68 FR 54588, Sept.
17, 2003]
§ 135.389 Large nontransport category
airplanes: Takeoff limitations.
(a) No person operating a large non-
transport category airplane may take
off that airplane at a weight greater
than the weight that would allow the
airplane to be brought to a safe stop
within the effective length of the run-
way, from any point during the takeoff
before reaching 105 percent of min-
imum control speed (the minimum
speed at which an airplane can be safe-
ly controlled in flight after an engine
becomes inoperative) or 115 percent of
the power off stalling speed in the
takeoff configuration, whichever is
greater.
(b) For the purposes of this section—
(1) It may be assumed that takeoff
power is used on all engines during the
acceleration;
(2) Not more than 50 percent of the
reported headwind component, or not
less than 150 percent of the reported
tailwind component, may be taken into
account;
(3) The average runway gradient (the
difference between the elevations of
the endpoints of the runway divided by
the total length) must be considered if
it is more than one-half of one percent;
(4) It is assumed that the airplane is
operating in standard atmosphere; and
(5) For takeoff,
effective length of the
runway
means the distance from the
end of the runway at which the takeoff
is started to a point at which the ob-
struction clearance plane associated
with the other end of the runway inter-
sects the runway centerline.
§ 135.391 Large nontransport category
airplanes: En route limitations: One
engine inoperative.
(a) Except as provided in paragraph
(b) of this section, no person operating
a large nontransport category airplane
may take off that airplane at a weight
that does not allow a rate of climb of
at least 50 feet a minute, with the crit-
ical engine inoperative, at an altitude
of at least 1,000 feet above the highest
obstruction within five miles on each
side of the intended track, or 5,000 feet,
whichever is higher.
(b) Without regard to paragraph (a)
of this section, if the Administrator
finds that safe operations are not im-
paired, a person may operate the air-
plane at an altitude that allows the
airplane, in case of engine failure, to
clear all obstructions within five miles
on each side of the intended track by
1,000 feet. If this procedure is used, the
rate of descent for the appropriate
weight and altitude is assumed to be 50
feet a minute greater than the rate in
the approved performance data. Before
approving such a procedure, the Ad-
ministrator considers the following for
the route, route segement, or area con-
cerned:
(1) The reliability of wind and weath-
er forecasting.
(2) The location and kinds of naviga-
tion aids.
