# AD 69-08-09: LYCOMING ENGINES Model IO-540-G1A5 Engines

- Type: Airworthiness directive
- Status: Current
- Products: Lycoming Engines IO-540-G1A5
- Effective: April 23, 1969
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-751
- Registered aircraft: 4,226 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CBD04B696B8D3CE78625682C007470D7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/69-08-09

## The airworthiness directive

69-08-09 LYCOMING ENGINES: Amdt. 39-751. Applies to all Lycoming Model IO-540-G1A5 engines installed with Hartzell HC-A3VK-2A/8433A-7 Propellers. Compliance required within the next 10 hours time in service after the effective date of this AD. To prevent failure of the engine crankshaft, install a placard on the aircraft instrument panel in clear view of the pilot and as close as practicable to the manifold pressure gage to read: "Do not exceed 24 inches Hg manifold pressure below 2400 rpm." This amendment is effective April 23, 1969.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1E4](https://openairdocs.org/tcds/1E4): Lycoming Engines; names 1 of 81 models: IO-540-G1A5

## 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: 4,226 (0 by airframe model, 4,226 by engine model)
- Makers: Piper 1,476, Cessna 1,109, Robinson Helicopter 294, Maule 229, Socata 156, Rockwell International 85, Commander 63, Smith 38, Aerofab 26, Bellanca 25

Models with the most aircraft:

- [Lycoming IO-540 series](https://openairdocs.org/engine/lycoming-io-540-series): 4,219 aircraft (engine model)
- [Lycoming IO-540-G1A5](https://openairdocs.org/engine/lycoming-io-540-g1a5): 7 aircraft (engine model)

All 3 models: https://openairdocs.org/ad/69-08-09/models.md
Every aircraft: https://openairdocs.org/ad/69-08-09/aircraft.md

Its text cites no advisory circulars or STCs.

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