14 CFR § 33.13 Airworthiness Standards: Aircraft Engines§ 33.13 [Reserved]Current through Jul 24, 2026 · Read all of Part 33⚠ 2 pending changes to Part 33Special Conditions: ZeroAvia, Inc. Model ZA601 Electric EnginesProposed Rule · Transportation DepartmentSpecial Conditions: Pratt and Whitney Canada, PW220A; New Engine Rating: Idle-Cruise RegimeProposed Rule · Transportation Department