AD 76-12-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | T5508D | AVCO LYCOMING Model T5508D Engines |
Unsafe Condition
Failure of the compressor air bleed band while the engine is operating at a power level requiring the bleed band to be closed, leading to partial power loss.
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Required Actions
Inspect the compressor air bleed band for edge wear and cracks daily before first flight and repair or replace as necessary per Avco Lycoming Service Bulletin 5508-0003. Replace P/N 2-160-147-02 retaining plate spacers with P/N 2-160-561-01 and P/N 2-161-182-01 compressor air bleed bands with P/N 2-161-182-03 by July 1, 1976, following Service Bulletin 5508-0007.
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Compliance Time
Prior to the first flight of each day and prior to July 1, 1976.
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Affected Aircraft
Avco Lycoming T5508D engines equipped with P/N 2-160-147-02 retaining plate spacers and P/N 2-161-182-01 compressor air bleed bands.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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