StacksVerified U.S. regulatory reference

14 CFR §25.1192

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
For reciprocating engines, the engine power section and all portions of the exhaust system must be isolated from the engine accessory compartment by a diaphragm that complies with the firewall requirements of § 25.1191.