Engine accessory section diaphragm.

CFR · 2024-01-01 · US · Title 14

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.

official document · source cfr-2024 · id 14:§ 121.251