Engine Exhaust - Thrust Reverser Latch Beam Firewall Insulation Blanket - Installation
- Published
- Effective
- Deadline
- Replaces
- 2010-26-01
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 777-200 series airplanes must retain the insulation blanket installation required by AD 2010-26-01 and perform inspections to determine if thrust reversers have affected part numbers. If affected parts are found, installation of the new insulation blanket is mandatory. Compliance with this AD is required by April 24, 2020.
Summary
Airworthiness Directive 2020-05-24 is a final rule issued by the Federal Aviation Administration addressing certain Boeing 777-200 series airplanes equipped with specific General Electric GE90 engine models. It requires the installation of a new insulation blanket on the latch beam firewall of each thrust reverser half to prevent potential engine fires. The directive also expands applicability to additional airplanes and mandates inspections for affected thrust reverser part numbers.
What changed
This directive supersedes AD 2010-26-01, retaining its requirements while adding more airplanes to the applicability. It introduces a requirement for inspecting thrust reversers to identify affected part numbers and mandates installation of a new insulation blanket if necessary. The cost of compliance and applicability have been updated to reflect these changes.
Why it matters
This AD addresses a critical safety concern involving potential engine fires that could weaken thrust reverser components, risking structural failure and possible separation during flight. Compliance ensures continued airworthiness and safety of affected Boeing 777-200 aircraft, protecting passengers, crew, and ground personnel. Operators and maintenance organizations must be aware of the expanded applicability and inspection requirements to maintain regulatory compliance.
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