AD 2017-15-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters |
Unsafe Condition
Check valves, part numbers 209-062-520-001 and 209-062-607-001, manufactured by Circor Aerospace and marked 'Circle Seal' between October 2011 and March 2015, may have a condition induced during assembly that can cause the valve body to crack, resulting in oil or fuel leakage. This could lead to engine failure or a fire and loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace all affected engine oil and fuel check valves within 25 hours time-in-service (TIS). Prohibit installing check valves P/N 209-062-520-001 or P/N 209-062-607-001 manufactured by Circor Aerospace, marked 'Circle Seal,' and with manufacturing date codes from '10/11' to '03/15' on any helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service (TIS)
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Affected Aircraft
Bell Model 212 and Model 412 helicopters, specifically those equipped with engine oil check valves P/N 209-062-520-001 or fuel check valves P/N 209-062-607-001, manufactured by Circor Aerospace, marked 'Circle Seal,' and with manufacturing date codes from October 2011 to March 2015.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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