768 

14 CFR Ch. I (1–1–14 Edition) 

§ 91.611 

recorder requirements of part 125 appli-
cable to the aircraft, notwithstanding 
such deviation authority. 

[Doc. No. 18334, 54 FR 34318, Aug. 18, 1989, as 
amended by Amdt. 91–226, 56 FR 51621, Oct. 
11, 1991; Amdt. 91–228, 57 FR 19353, May 5, 
1992; Amdt. 91–300, 73 FR 12564, Mar. 7, 2008; 
Amdt. 91–304, 73 FR 73178, Dec. 2, 2008; Amdt. 
91–300, 74 FR 32800, July 9, 2009; Amdt. 91–313, 
75 FR 17045, Apr. 5, 2010] 

§ 91.611

Authorization for ferry flight 

with one engine inoperative. 

(a) 

General.  The holder of an air car-

rier operating certificate or an oper-
ating certificate issued under part 125 
may conduct a ferry flight of a four-en-
gine airplane or a turbine-engine-pow-
ered airplane equipped with three en-
gines, with one engine inoperative, to a 
base for the purpose of repairing that 
engine subject to the following: 

(1) The airplane model has been test 

flown and found satisfactory for safe 
flight in accordance with paragraph (b) 
or (c) of this section, as appropriate. 
However, each operator who before No-
vember 19, 1966, has shown that a model 
of airplane with an engine inoperative 
is satisfactory for safe flight by a test 
flight conducted in accordance with 
performance data contained in the ap-
plicable Airplane Flight Manual under 
paragraph (a)(2) of this section need 
not repeat the test flight for that 
model. 

(2) The approved Airplane Flight 

Manual contains the following per-
formance data and the flight is con-
ducted in accordance with that data: 

(i) Maximum weight. 
(ii) Center of gravity limits. 
(iii) Configuration of the inoperative 

propeller (if applicable). 

(iv) Runway length for takeoff (in-

cluding temperature accountability). 

(v) Altitude range. 
(vi) Certificate limitations. 
(vii) Ranges of operational limits. 
(viii) Performance information. 
(ix) Operating procedures. 
(3) The operator has FAA approved 

procedures for the safe operation of the 
airplane, including specific require-
ments for— 

(i) Limiting the operating weight on 

any ferry flight to the minimum nec-
essary for the flight plus the necessary 
reserve fuel load; 

(ii) A limitation that takeoffs must 

be made from dry runways unless, 
based on a showing of actual operating 
takeoff techniques on wet runways 
with one engine inoperative, takeoffs 
with full controllability from wet run-
ways have been approved for the spe-
cific model aircraft and included in the 
Airplane Flight Manual: 

(iii) Operations from airports where 

the runways may require a takeoff or 
approach over populated areas; and 

(iv) Inspection procedures for deter-

mining the operating condition of the 
operative engines. 

(4) No person may take off an air-

plane under this section if— 

(i) The initial climb is over thickly 

populated areas; or 

(ii) Weather conditions at the takeoff 

or destination airport are less than 
those required for VFR flight. 

(5) Persons other than required flight 

crewmembers shall not be carried dur-
ing the flight. 

(6) No person may use a flight crew-

member for flight under this section 
unless that crewmember is thoroughly 
familiar with the operating procedures 
for one-engine inoperative ferry flight 
contained in the certificate holder’s 
manual and the limitations and per-
formance information in the Airplane 
Flight Manual. 

(b) 

Flight tests: reciprocating-engine- 

powered airplanes. The airplane per-
formance of a reciprocating-engine- 
powered airplane with one engine inop-
erative must be determined by flight 
test as follows: 

(1) A speed not less than 1.3 V

S1

must 

be chosen at which the airplane may be 
controlled satisfactorily in a climb 
with the critical engine inoperative 
(with its propeller removed or in a con-
figuration desired by the operator and 
with all other engines operating at the 
maximum power determined in para-
graph (b)(3) of this section. 

(2) The distance required to accel-

erate to the speed listed in paragraph 
(b)(1) of this section and to climb to 50 
feet must be determined with— 

(i) The landing gear extended; 
(ii) The critical engine inoperative 

and its propeller removed or in a con-
figuration desired by the operator; and 

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