502 

14 CFR Ch. I (1–1–24 Edition) 

§ 135.377 

the ground handling characteristics of 
the type of airplane, and other condi-
tions such as landing aids and terrain, 
and allowing for the effect of the land-
ing path and roll of not more than 50 
percent of the headwind component or 
not less than 150 percent of the tail-
wind component. 

(b) An airplane that would be prohib-

ited from being taken off because it 
could not meet paragraph (a)(2) of this 
section may be taken off if an alter-
nate airport is selected that meets all 
of this section except that the airplane 
can accomplish a full stop landing 
within 70 percent of the effective 
length of the runway. 

§ 135.377 Large transport category air-

planes: Reciprocating engine pow-

ered: Landing limitations: Alternate 

airports. 

No person may list an airport as an 

alternate airport in a flight plan unless 
the airplane (at the weight anticipated 
at the time of arrival at the airport), 
based on the assumptions in § 135.375(a) 
(1) and (2), can be brought to a full stop 
landing within 70 percent of the effec-
tive length of the runway. 

§ 135.379 Large transport category air-

planes: Turbine engine powered: 

Takeoff limitations. 

(a) No person operating a turbine en-

gine powered large transport category 
airplane may take off that airplane at 
a weight greater than that listed in the 
Airplane Flight Manual for the ele-
vation of the airport and for the ambi-
ent temperature existing at take- off. 

(b) No person operating a turbine en-

gine powered large transport category 
airplane certificated after August 26, 
1957, but before August 30, 1959 (SR422, 
422A), may take off that airplane at a 
weight greater than that listed in the 
Airplane Flight Manual for the min-
imum distance required for takeoff. In 
the case of an airplane certificated 
after September 30, 1958 (SR422A, 422B), 
the takeoff distance may include a 
clearway distance but the clearway dis-
tance included may not be greater than 
one-half of the takeoff run. 

(c) No person operating a turbine en-

gine powered large transport category 
airplane certificated after August 29, 
1959 (SR422B), may take off that air-
plane at a weight greater than that 

listed in the Airplane Flight Manual at 
which compliance with the following 
may be shown: 

(1) The accelerate-stop distance, as 

defined in § 25.109 of this chapter, must 
not exceed the length of the runway 
plus the length of any stopway. 

(2) The takeoff distance must not ex-

ceed the length of the runway plus the 
length of any clearway except that the 
length of any clearway included must 
not be greater than one-half the length 
of the runway. 

(3) The takeoff run must not be 

greater than the length of the runway. 

(d) No person operating a turbine en-

gine powered large transport category 
airplane may take off that airplane at 
a weight greater than that listed in the 
Airplane Flight Manual— 

(1) For an airplane certificated after 

August 26, 1957, but before October 1, 
1958 (SR422), that allows a takeoff path 
that clears all obstacles either by at 
least (35 + 0.01 D) feet vertically (D is 
the distance along the intended flight 
path from the end of the runway in 
feet), or by at least 200 feet hori-
zontally within the airport boundaries 
and by at least 300 feet horizontally 
after passing the boundaries; or 

(2) For an airplane certificated after 

September 30, 1958 (SR422A, 422B), that 
allows a net takeoff flight path that 
clears all obstacles either by a height 
of at least 35 feet vertically, or by at 
least 200 feet horizontally within the 
airport boundaries and by at least 300 
feet horizontally after passing the 
boundaries. 

(e) In determining maximum 

weights, minimum distances, and flight 
paths under paragraphs (a) through (d) 
of this section, correction must be 
made for the runway to be used, the 
elevation of the airport, the effective 
runway gradient, the ambient tempera-
ture and wind component at the time 
of takeoff, and, if operating limitations 
exist for the minimum distances re-
quired for takeoff from wet runways, 
the runway surface condition (dry or 
wet). Wet runway distances associated 
with grooved or porous friction course 
runways, if provided in the Airplane 
Flight Manual, may be used only for 
runways that are grooved or treated 
with a porous friction course (PFC) 

503 

Federal Aviation Administration, DOT 

§ 135.383 

overlay, and that the operator deter-
mines are designed, constructed, and 
maintained in a manner acceptable to 
the Administrator. 

(f) For the purposes of this section, it 

is assumed that the airplane is not 
banked before reaching a height of 50 
feet, as shown by the takeoff path or 
net takeoff flight path data (as appro-
priate) in the Airplane Flight Manual, 
and after that the maximum bank is 
not more than 15 degrees. 

(g) For the purposes of this section, 

the terms, 

takeoff distance, takeoff run, 

net takeoff flight path, 

have the same 

meanings as set forth in the rules 
under which the airplane was certifi-
cated. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–71, 63 FR 8321, Feb. 18, 
1998] 

§ 135.381 Large transport category air-

planes: Turbine engine powered: En 

route limitations: One engine inop-

erative. 

(a) No person operating a turbine en-

gine powered large transport category 
airplane may take off that airplane at 
a weight, allowing for normal con-
sumption of fuel and oil, that is greater 
than that which (under the approved, 
one engine inoperative, en route net 
flight path data in the Airplane Flight 
Manual for that airplane) will allow 
compliance with paragraph (a) (1) or (2) 
of this section, based on the ambient 
temperatures expected en route. 

(1) There is a positive slope at an al-

titude of at least 1,000 feet above all 
terrain and obstructions within five 
statute miles on each side of the in-
tended track, and, in addition, if that 
airplane was certificated after August 
29, 1958 (SR422B), there is a positive 
slope at 1,500 feet above the airport 
where the airplane is assumed to land 
after an engine fails. 

(2) The net flight path allows the air-

plane to continue flight from the cruis-
ing altitude to an airport where a land-
ing can be made under § 135.387 clearing 
all terrain and obstructions within five 
statute miles of the intended track by 
at least 2,000 feet vertically and with a 
positive slope at 1,000 feet above the 
airport where the airplane lands after 
an engine fails, or, if that airplane was 
certificated after September 30, 1958 

(SR422A, 422B), with a positive slope at 
1,500 feet above the airport where the 
airplane lands after an engine fails. 

(b) For the purpose of paragraph 

(a)(2) of this section, it is assumed 
that— 

(1) The engine fails at the most crit-

ical point en route; 

(2) The airplane passes over the crit-

ical obstruction, after engine failure at 
a point that is no closer to the obstruc-
tion than the approved navigation fix, 
unless the Administrator authorizes a 
different procedure based on adequate 
operational safeguards; 

(3) An approved method is used to 

allow for adverse winds; 

(4) Fuel jettisoning will be allowed if 

the certificate holder shows that the 
crew is properly instructed, that the 
training program is adequate, and that 
all other precautions are taken to en-
sure a safe procedure; 

(5) The alternate airport is selected 

and meets the prescribed weather mini-
mums; and 

(6) The consumption of fuel and oil 

after engine failure is the same as the 
consumption that is allowed for in the 
approved net flight path data in the 
Airplane Flight Manual. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–110, 72 FR 31685, June 
7, 2007] 

§ 135.383 Large transport category air-

planes: Turbine engine powered: En 

route limitations: Two engines inop-

erative. 

(a) Airplanes certificated after Au-

gust 26, 1957, but before October 1, 1958 
(SR422). No person may operate a tur-
bine engine powered large transport 
category airplane along an intended 
route unless that person complies with 
either of the following: 

(1) There is no place along the in-

tended track that is more than 90 min-
utes (with all engines operating at 
cruising power) from an airport that 
meets § 135.387. 

(2) Its weight, according to the two- 

engine-inoperative, en route, net flight 
path data in the Airplane Flight Man-
ual, allows the airplane to fly from the 
point where the two engines are as-
sumed to fail simultaneously to an air-
port that meets § 135.387, with a net 
flight path (considering the ambient