Section 135.389

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

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]

Section 135.389 Large nontransport category
airplanes: Takeoff limitations.
(a) No person operating a large nontransport 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 runway, from any point during the takeoff
before reaching 105 percent of minimum control speed (the minimum
speed at which an airplane can be safely 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 obstruction clearance plane associated
with the other end of the runway intersects the runway centerline.
Section 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 impaired, a person may operate the airplane 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 Administrator considers the following for
the route, route segement, or area concerned:
(1) The reliability of wind and weather forecasting.
(2) The location and kinds of navigation aids.
(3) The prevailing weather conditions, particularly the frequency and
amount of turbulence normally encountered.
(4) Terrain features.
(5) Air traffic problems.
(6) Any other operational factors
that affect the operations.
(c) For the purposes of this section, it
is assumed that - 
(1) The critical engine is inoperative;
(2) The propeller of the inoperative
engine is in the minimum drag position;
(3) The wing flaps and landing gear
are in the most favorable position;
(4) The operating engines are operating at the maximum continuous
power available;
(5) The airplane is operating in standard atmosphere; and
(6) The weight of the airplane is progressively reduced by the anticipated
consumption of fuel and oil.
Section 135.393 Large nontransport category
airplanes: Landing limitations: Destination airports.
(a) No person operating a large nontransport category airplane may take
off that airplane at a weight that - 
(1) Allowing for anticipated consumption of fuel and oil, is greater than the

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