[Code of Federal Regulations]

[Title 14, Volume 2]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR121.191]



[Page 441-442]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 

                               (CONTINUED)

 

PART 121_OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL 

OPERATIONS--Table of Contents

 

          Subpart I_Airplane Performance Operating Limitations

 

Sec. 121.191  Airplanes: Turbine engine powered: En route limitations: 

One engine inoperative.



    (a) No person operating a turbine engine powered airplane may take 

off that airplane at a weight, allowing for normal consumption 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 altitude of at least 1,000 feet 

above all terrain and obstructions within five statute miles on each 

side of the intended track, and, in addition, if that airplane was 

certificated after August 29, 1959 (SR 422B) 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 airplane to continue flight from 

the cruising altitude to an airport where a landing can be made under 

Sec. 121.197, 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 (SR 422A, 422B), with a positive slope at 1,500 feet 

above the airport where the airplane lands after an engine fails.

    (b) For the purposes of paragraph (a)(2) of this section, it is 

assumed that--



[[Page 442]]



    (1) The engine fails at the most critical point en route;

    (2) The airplane passes over the critical obstruction, after engine 

failure at a point that is no closer to the obstruction than the nearest 

approved radio 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 insure a safe 

procedure;

    (5) The alternate airport is specified in the dispatch or flight 

release and meets the prescribed weather minimums; 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. 6258, 29 FR 19198, Dec. 31, 1964; 30 FR 130, Jan. 7, 1965, as 

amended by Amdt. 121-143, 43 FR 22641, May 25, 1978]