AFM Change - Operational Limitations
- Published
- Effective
- Deadline
- Replaces
- 2018-08-03
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 787-8 and 787-9 airplanes must revise their airplane flight manuals to incorporate the updated ETOPS limitations as specified in the AD. This revision must be accomplished by April 26, 2018, the effective date of the AD. Compliance with this AD also terminates all requirements of the previous AD 2018-08-03. Stakeholders should monitor for future rulemaking related to permanent engine modifications.
Summary
Federal Register Volume 83, Number 81 (April 26, 2018) Final Rule Airworthiness Directive 2018-09-05 addresses Boeing 787-8 and 787-9 airplanes powered by Rolls-Royce Trent 1000-A2, AE2, C2, CE2, D2, E2, G2, H2, J2, K2, and L2 turbofan engines. This directive mandates revising the airplane flight manual (AFM) to impose limitations on extended operations (ETOPS) to reduce the risk of intermediate pressure compressor blade failures during high thrust settings after an engine failure. The AD aims to enhance flight safety by preventing potential dual engine failures during ETOPS diversions.
What changed
This new airworthiness directive requires updating the AFM to include revised ETOPS limitations based on updated data from Boeing and Rolls-Royce regarding IPC blade resonant frequency issues. It supersedes the previous AD 2018-08-03 by mandating more restrictive operational limits to minimize the risk of blade failure under certain conditions. The AD represents an interim safety measure pending development of a permanent engine modification.
Why it matters
This AD is critical for operators and maintenance teams as it addresses a significant safety risk involving potential failure of the remaining engine during ETOPS diversions after an engine shutdown. Compliance reduces the likelihood of in-flight shutdowns caused by IPC blade fatigue and vibration, thereby enhancing overall flight safety and reliability. It also affects operational planning and maintenance scheduling for affected Boeing 787 aircraft powered by specified Rolls-Royce Trent 1000 engines.
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