Airplane Flight Manual / Minimum Equipment List - Amendment
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must revise their airplane flight manuals and minimum equipment lists as specified by August 25, 2023. They must prohibit dispatch under MMEL Item 30-21-01B when the engine anti-ice valve is locked open. Operators should monitor for further FAA communications regarding a manufacturer-developed modification and possible future rulemaking.
Summary
The Airplane Flight Manual / Minimum Equipment List - Amendment is a final rule airworthiness directive issued by the FAA affecting all Boeing Company Model 737 airplanes equipped with CFM International LEAP-1B series turbofan engines. It addresses an unsafe condition related to engine anti-ice use in dry air that can cause overheating and failure of the engine inlet inner barrel. The directive mandates revisions to the airplane flight manual and minimum equipment list to mitigate this risk.
What changed
This new airworthiness directive requires operators to revise the existing airplane flight manual to limit the use of engine anti-ice in certain environmental and operational conditions. It also requires revising the operator's minimum equipment list to prohibit dispatch when the engine anti-ice valve is locked open under a specific MMEL item. These changes are interim pending a future modification from the manufacturer.
Why it matters
This amendment is critical for aviation professionals because it prevents potential engine inlet failures that could lead to severe damage, decompression, and loss of airplane control. Operators and maintenance teams must ensure compliance to avoid safety hazards and regulatory violations. The directive also impacts dispatch decisions and operational procedures related to engine anti-ice systems.
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