T83-03-51: Fourth Stage Turbine Rotors Assembly
FAA order T83-03-51 is an airworthiness directive. The FAA's subject line: Fourth Stage Turbine Rotors Assembly. It names the Honeywell ALF 502 series, Honeywell ALF502R-5 engines: about 6 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Engine
- Makes
- Honeywell International Inc.
- Models
- ALF502L, ALF502L-2, ALF502L-2A, ALF502L-2C, ALF502L-3, ALF502R-3, ALF502R-3A, ALF502R-4, ALF502R-5, ALF502R-6
- Engine series
- Honeywell ALF 502 series 4 aircraft
Honeywell ALF502R-5 2 aircraft
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 (1,000 characters)
T83-03-51 AVCO LYCOMING: Telegram issued February 4, 1983. Applies to Avco Lycoming ALF502 series model turbofan engines.
Unless already accomplished for all engines having less than 100 hours total operating time, within the next 10 engine operating hours, remove all fourth stage turbine rotors assembly P/N 2-141-170-23 or -27 and replace with a rotor which has satisfactorily met the etch inspection requirements for the blades per Avco Lycoming Service Bulletin ALF502-72-0038.
NOTE: Avco Lycoming will provide replacement fourth stage turbine rotors which have been etch inspected per Service Bulletin ALF502-72-0038.
Airplanes may be ferried in accordance with the provisions of FAR 21.197 to a base where the AD can be accomplished.
Upon request of an operator an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Engine Certification Branch, FAA, New England Region.
This airworthiness directive becomes effectiveupon receipt.
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/T83-03-51.json · aircraft systems.