Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 3Date: 2022-01-01Original Date: 2022-01-01Title: Section 121.251 - Engine accessory section diaphragm.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 J - Special Airworthiness Requirements.
§ 121.251 Engine accessory section diaphragm. Unless equivalent protection can be shown by other means, a diaphragm that complies with § 121.247 must be provided on air-cooled engines to isolate the engine power section and all parts of the exhaust system from the engine accessory compartment.