AD 2005-20-38
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | 212 | Airworthiness Directives; Bell Helicopter Textron Model 212, 412, and 412EP Helicopters |
| aircraft | Bell | Helicopter Textron Model 212 | Airworthiness Directives; Bell Helicopter Textron Model 212, 412, and 412EP Helicopters |
Unsafe Condition
Adapter rupture during nitrogen charging due to inadequate wall thickness caused by excessive counter bore depth (dimension D) exceeding .860 inch.
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Required Actions
Inspect the counter bore depth (dimension D) of the adapter. If dimension D exceeds .860 inch, replace the reservoir assembly and adapter with airworthy parts before further flight. Discharge the nitrogen from the reservoir assembly and remove the valve assembly and air line from the adapter for inspection.
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Compliance Time
Within 24 hours time-in-service (TIS) or before the next emergency floatation supply bottle nitrogen charging, whichever occurs first.
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Affected Aircraft
Bell Helicopter Textron Model 212, 412, and 412EP helicopters modified with Aeronautical Accessories, Inc. (AAI) Supplemental Type Certificate (STC) SH2820SO or with AAI Parts Manufacturer Approval (PMA) reservoir assembly (P/N 212-372-050) and adapter (P/N 212-371-002) installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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