57-24-01: Impeller Drive Gear Assemblies
FAA order 57-24-01 is an airworthiness directive. The FAA's subject line: Impeller Drive Gear Assemblies. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Engine
- Makes
- Curtiss-Wright/Marquette, Inc.
- Models
- Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91), Double Row Turbo Cyclone 972TC18DA2, Double Row Turbo Cyclone 972TC18DA3, Double Row Turbo Cyclone 972TC18DA4, Double Row Turbo Cyclone 981TC18EA1, Double Row Turbo Cyclone 988TC18EA1, Double Row Turbo Cyclone 988TC18EA2, Double Row Turbo Cyclone 988TC18EA3, Double Row Turbo Cyclone 988TC18EA4, Double Row Turbo Cyclone 988TC18EA5, Double Row Turbo Cyclone 988TC18EA6
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (359 characters)
57-24-01 WRIGHT: Applies to All TC18DA and TC18EA Series Engines.
Compliance required at next overhaul but not later than July 31, 1958.
To improve the durability of the impeller drive gear assemblies of the subject engines, intermediate impeller drive gear P/N 145316 must be replaced with P/N 138464 gear, or any gear approved after December 1, 1957.
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/57-24-01.json · aircraft systems.