507 

Federal Aviation Administration, DOT 

§ 135.398 

(3) The prevailing weather condi-

tions, particularly the frequency and 
amount of turbulence normally en-
countered. 

(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 posi-
tion; 

(3) The wing flaps and landing gear 

are in the most favorable position; 

(4) The operating engines are oper-

ating at the maximum continuous 
power available; 

(5) The airplane is operating in stand-

ard atmosphere; and 

(6) The weight of the airplane is pro-

gressively reduced by the anticipated 
consumption of fuel and oil. 

§ 135.393 Large nontransport category 

airplanes: Landing limitations: Des-

tination airports. 

(a) No person operating a large non-

transport category airplane may take 
off that airplane at a weight that— 

(1) Allowing for anticipated consump-

tion of fuel and oil, is greater than the 
weight that would allow a full stop 
landing within 60 percent of the effec-
tive length of the most suitable run-
way at the destination airport; and 

(2) Is greater than the weight allow-

able if the landing is to be made on the 
runway— 

(i) With the greatest effective length 

in still air; and 

(ii) Required by the probable wind, 

taking into account not more than 50 
percent of the headwind component or 
not less than 150 percent of the tail-
wind component. 

(b) For the purpose of this section, it 

is assumed that— 

(1) The airplane passes directly over 

the intersection of the obstruction 
clearance plane and the runway at a 
height of 50 feet in a steady gliding ap-
proach at a true indicated airspeed of 
at least 1.3 V

so

; 

(2) The landing does not require ex-

ceptional pilot skill; and 

(3) The airplane is operating in stand-

ard atmosphere. 

§ 135.395 Large nontransport category 

airplanes: Landing limitations: Al-
ternate airports. 

No person may select an airport as 

an alternate airport for a large non-
transport category airplane unless that 
airplane (at the weight anticipated at 
the time of arrival), based on the as-
sumptions in § 135.393(b), can be 
brought to a full stop landing within 70 
percent of the effective length of the 
runway. 

§ 135.397 Small transport category air-

plane performance operating limi-
tations. 

(a) No person may operate a recipro-

cating engine powered small transport 
category airplane unless that person 
complies with the weight limitations 
in § 135.365, the takeoff limitations in 
§ 135.367 (except paragraph (a)(3)), and 
the landing limitations in §§ 135.375 and 
135.377. 

(b) No person may operate a turbine 

engine powered small transport cat-
egory airplane unless that person com-
plies with the takeoff limitations in 
§ 135.379 (except paragraphs (d) and (f)) 
and the landing limitations in §§ 135.385 
and 135.387. 

§ 135.398 Commuter category airplanes 

performance operating limitations. 

(a) No person may operate a com-

muter category airplane unless that 
person complies with the takeoff 
weight limitations in the approved Air-
plane Flight Manual. 

(b) No person may take off an air-

plane type certificated in the com-
muter category at a weight greater 
than that listed in the Airplane Flight 
Manual that allows a net takeoff flight 
path that clears all obstacles either by 
a height of at least 35 feet vertically, 
or at least 200 feet horizontally within 
the airport boundaries and by at least 
300 feet horizontally after passing the 
boundaries. 

(c) No person may operate a com-

muter category airplane unless that 
person complies with the landing limi-
tations prescribed in §§ 135.385 and 
135.387 of this part. For purposes of this