Engine Oil / Aircraft Fuel System - Oil / Fuel Check Valves - Replacement
- Published
- Effective
- Deadline
- Replaces
- 2018-17-01
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Bell Model 212, 412, 412CF, and 412EP helicopters must replace each affected engine oil and fuel check valve within 25 hours time-in-service. They must also ensure that no affected Circor Aerospace check valves marked "Circle Seal" with manufacturing dates from October 2011 through March 2015, except those marked "TQL," are installed on any helicopter. Comments on the directive must be submitted by July 5, 2019.
Summary
Airworthiness Directive 2019-09-02 is a final rule issued by the Federal Aviation Administration addressing Bell Helicopter Textron, Inc. models 212, 412, 412CF, and 412EP. It mandates the replacement of certain engine oil and fuel check valves manufactured by Circor Aerospace, which have been found to crack or leak, potentially causing engine failure or fire. This directive expands previous requirements to include all affected helicopter models to ensure continued airworthiness and safety.
What changed
This directive supersedes AD 2018-17-01 by correcting an omission that excluded Bell Model 412 helicopters from the engine oil check valve replacement requirement. It retains all previous requirements but expands the scope to cover all applicable Bell helicopter models. Additionally, it prohibits installing the affected check valves on any helicopter.
Why it matters
The directive addresses a critical safety issue involving cracked or leaking check valves that can lead to loss of engine lubrication or fuel, engine failure, or fire, posing a significant risk to flight safety. Operators, maintenance organizations, and compliance teams must ensure affected valves are replaced promptly to prevent in-flight emergencies. Compliance with this AD is essential to maintain regulatory approval and safe operation of the affected helicopters.
More for Bell Textron Inc. (Bti) 212
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- EASA AD 2022-0047-CNCANCELLED: Fuselage — Tailboom Attachment — Inspection / ReplacementOct 31, 2024
- EASA AD US-2024-16-19Fuselage — Tailboom Attachment — Inspection / ReplacementOct 31, 2024
- EASA AD US-2024-19-17
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