AD 2019-09-02
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
The engine oil check valves and fuel check valves may have a condition induced during assembly that can cause the valve body to crack, resulting in oil or fuel leakage. This condition could result in loss of lubrication or fuel to the engine, failure of the engine or a fire, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours time-in-service (TIS), replacing each fuel check valve and each engine oil check valve. This AD also prohibits installing on any helicopter a check valve P/N 209-062-520-001 or P/N 209-062-607-001 manufactured by Circor Aerospace, marked ``Circle Seal'' and with a manufacturing date code of ``10/11'' (October 2011) through ``03/15'' (March 2015), except for a check valve marked ``TQL'' next to the manufacturing date code.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service (TIS)
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 212, 412, 412CF, and 412EP helicopters with an engine oil check valve part number (P/N) 209-062-520-001 or fuel check valve P/N 209-062-607-001 manufactured by Circor Aerospace, marked ``Circle Seal'' and with a manufacturing date code of ``10/11'' (October 2011) through ``03/15'' (March 2015), except a check valve marked ``TQL'' next to the manufacturing date code.
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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