# AD 75-01-05: Compressor Impeller Assembly Vane

- Type: Airworthiness directive
- Status: Current
- Products: Honeywell International T5313B
- Effective: January 17, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-2063
- Registered aircraft: 108 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4774E2C54A5FC98D8625682A0072F4AB.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-01-05

## The airworthiness directive

75-01-05 AVCO LYCOMING: Amendment 39-2063. Applies to all Avco Lycoming T5313B turboshaft engines. Compliance required, unless already accomplished, prior to the accumulation of 100 hours time in service after the effective date of this AD. To prevent possible centrifugal compressor impeller assembly vane failures leading to performance deterioration and partial or complete power loss, remove centrifugal compressor impeller assemblies, part numbers 1-100-078-03, 1-100-078-04, and 1-100-078-10 and replace with centrifugal compressor impeller assembly, part number 1-100-078-08. Equivalent methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, FAA, New England Region. NOTE: (Avco Lycoming Service Bulletin Number 0042 pertains to this subject.) This amendment becomes effective January 17, 1975

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E17EA](https://openairdocs.org/tcds/E17EA): Ozark Aeroworks LLC; names 1 of 6 models: T5313B

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 108 (0 by airframe model, 108 by engine model)
- Makers: Bell 76, Garlick Helicopters 8, Grumman 4, Southwest Florida 3, Western International Avia 2, Williams Helicopter 2, Anderson Douglas 1, Bell Helicopter 1, Bell-Colonial 1, Bell-Sw Florida Avn 1

Models with the most aircraft:

- [Lycoming T-53 series](https://openairdocs.org/engine/lycoming-t-53-series): 95 aircraft (engine model)
- [Lycoming T5313B](https://openairdocs.org/engine/lycoming-t5313b): 8 aircraft (engine model)
- [Honeywell T5313B](https://openairdocs.org/engine/honeywell-t5313b): 5 aircraft (engine model)

All 5 models: https://openairdocs.org/ad/75-01-05/models.md
Every aircraft: https://openairdocs.org/ad/75-01-05/aircraft.md

Its text cites no advisory circulars or STCs.

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