AD 67-22-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | HIO-360-A1A | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | HIO-360-B1A | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | HIO-360-B1B | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | HIO-360-C1A | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | IO-320-A1A | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | IO-320-A2A | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | IO-320-B1A | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | IO-320-B1B | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | IO-320-B1C | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
| engine | Lycoming Engines | IO-320-B1D | LYCOMING Model IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5 and D4A5 Engines |
Unsafe Condition
Failure of the Delrin stemmed fuel diaphragm assembly (P/N 2520887 or 2523067) could occur.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove fuel diaphragm assembly P/N 2520887 or 2523067 and spring holder P/N 2520636. Replace with fuel diaphragm assembly P/N 2523307 (uncoated or green teflon coated), retainer cup P/N 2523478, and nut P/N 178491.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours' time in service after the effective date of this AD, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lycoming Engines models IO-320 Series, IO-360-A1A, -A2A, -B1B, -B1C, -B1D, -C1A, IVO-360-A1A, HIO-360-A1A, -B1A, -B1B, -C1A, IO-540-C1B5, -C1C5, -C2C, C4B5, and D4A5 engines not equipped with excepted Bendix RSA-5 Series fuel injectors (parts list numbers with specified suffix/serial numbers or higher)
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.