AD 96-09-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | AEIO-320-E1A | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E1B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E2A | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E2B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AIO-320-A1A | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AIO-320-A1B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AIO-320-A2A | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AIO-320-A2B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AIO-320-B1B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AIO-320-C1B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
Unsafe Condition
Oil pump failure due to impeller failure caused by aluminum impellers not having the reliability of hardened steel impellers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace sintered iron and aluminum impellers and shafts with hardened steel impellers and shafts in accordance with specified service bulletins. Compliance is required by the next engine overhaul or within five years from the effective date of this AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
The next engine overhaul or within five years from the effective date of this AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Textron Lycoming reciprocating engines models AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A, AEIO-320-E2B, AIO-320-A1A, AIO-320-A1B, AIO-320-A2A, and others listed in the AD, specifically those with aluminum impellers, part number LW-13775.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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