AD 96-23-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | AEIO-320-D1B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-D2B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| 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 | AEIO-360-A1A | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1B | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1B6 | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1C | Airworthiness Directives; Textron Lycoming Reciprocating Engines |
Unsafe Condition
High pressure fuel pumps, Part Number LW-15473, with manufacturing date codes 154739506, 154739507, or 154739510, may develop defects during manufacturing causing the fuel pump gasket (P/N 5621005) to separate from the pump diaphragm assembly and lodge in the pump outlet port, leading to inflight engine failure due to fuel starvation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a maintenance records check to identify suspect high pressure fuel pumps. If suspect pumps are indicated, inspect to determine if the pump has one of the specified date codes. Disassemble and inspect pumps with suspect date codes, remove from service and replace if necessary, and report unserviceable pumps.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 hours time in service (TIS) after the effective date of this AD (December 17, 1996), except for those subject to the priority letter effective October 28, 1996.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Textron Lycoming IO-320, LIO-320, AEIO-320, IO-360, LIO-360, AEIO-360, HIO-360, TO-360, IO-540, O-540-L, LIO-540, and AEIO-540 series reciprocating engines with high pressure fuel pumps P/N LW-15473 having date codes 154739506, 154739507, or 154739510, installed between July 18, 1995, and August 14, 1996, or purchased as replacements on or after July 18, 1995.
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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