Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 3Date: 2022-01-01Original Date: 2022-01-01Title: Section 121.201 - Nontransport category airplanes: En route limitations: One engine inoperative.Context: Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED). SUBCHAPTER G - AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS. PART 121 - OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS. Subpart I - Airplane Performance Operating Limitations.
Code of Federal Regulations / Title 14 - Aeronautics and Space / Vol. 3 / 2022-01-01106
§ 121.201 Nontransport category airplanes: En route limitations: One engine inoperative. (a) Except as provided in paragraph (b) of this section, no person operating a 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 critical 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) Notwithstanding 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 5 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 segment, 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 control problems. (6) Any other operational factors that affect the operation. (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.