AD 98-02-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | AEIO-320-D1B | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-D2B | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E1A | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E1B | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E2A | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-320-E2B | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1A | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1B | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1B6 | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
| engine | Lycoming Engines | AEIO-360-A1C | Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines |
Unsafe Condition
Cracks in crankshafts originating from corrosion pits in the inside diameter (ID) of the crankshaft, which can result in crankshaft failure, engine failure, propeller separation, forced landing, and possible damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform visual inspections of the crankshaft ID for corrosion pits. If corrosion pits are found, conduct a magnetic particle inspection (MPI) or fluorescent penetrant inspection (FPI) of the ID for cracks prior to further flight. Report inspection findings to the FAA. Apply a preventive treatment coating on non-corroded crankshafts to prevent corrosion.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Textron Lycoming 320 and 360 series reciprocating engines with ratings of 160 horsepower or greater, including models AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A, AEIO-320-E2B, AEIO-360-A, and others as listed in the AD.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.