Engine Exhaust - Inner Fixed Structure and Thrust Reverser - Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2020-26-08
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must determine if upper splitter fairing assembly part numbers KH60375 or KH11560 are installed and replace them with the new part number KH99185 by March 7, 2024. They must continue repetitive inspections of the inner fixed structure forward upper fire seal and thermal insulation blankets and perform on-condition replacements if damage is found. Installation of affected parts is prohibited after the effective date.
Summary
Airworthiness Directive 2024-01-04 is a final rule issued by the Federal Aviation Administration addressing Boeing 787-8, 787-9, and 787-10 airplanes powered by Rolls-Royce Trent 1000 engines. It focuses on inspections and replacement of the inner fixed structure forward upper fire seal and thermal insulation blankets in the thrust reverser area to prevent damage and potential fire hazards. This directive mandates inspection and replacement of specific upper splitter fairing assemblies to enhance engine fire safety.
What changed
This directive supersedes AD 2020-26-08 by continuing the required repetitive inspections and introducing mandatory replacement of affected upper splitter fairing assembly part numbers KH60375 and KH11560 with a new part number KH99185. It also prohibits installation of the affected parts and requires inspections for damage with applicable on-condition corrective actions. The update addresses additional affected parts and improves fire seal and insulation protection.
Why it matters
This AD is critical for aviation professionals as it mitigates the risk of uncontrolled engine fires caused by damage to the fire seal and thermal insulation blankets in the thrust reverser area. Operators and maintenance teams must ensure compliance to maintain aircraft safety and prevent thermal damage that could compromise the firewall integrity. Timely replacement and inspections reduce the risk of engine exhaust component release and potential damage to critical airplane areas.
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