EASA AD US-2018-25-11: Engine Exhaust - Electronic Engine Control Wiring - Inspection | RegNotify

Airworthiness DirectiveEASA AD US-2018-25-11

Engine Exhaust - Electronic Engine Control Wiring - Inspection

Published: Jan 16, 2019
Effective: Jan 18, 2019
Deadline: Jan 18, 2019

Boeing 777 200 300

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Operators of affected Boeing 777-200 and -300 series airplanes must perform repetitive inspections of the electronic engine control wire bundles and clips as specified in Boeing Service Bulletin 777-78-0082, Revision 1. If damage is found, corrective actions must be taken promptly. Compliance with this AD is required by January 18, 2019, the effective date of the directive.

Summary

Federal Register Volume 83, Number 240 (AD 2018-25-11) is a final rule airworthiness directive issued by the FAA for certain Boeing 777-200 and -300 series airplanes equipped with Rolls-Royce RB211-Trent 800 engines. It addresses inadequate clearance between thermal protection system insulation blankets and electronic engine control wiring, which has caused wire damage. The directive mandates repetitive inspections and corrective actions to ensure continued airworthiness.

What changed

This new airworthiness directive introduces mandatory repetitive inspections of the electronic engine control wire bundles and clips on affected Boeing 777 aircraft. It requires corrective actions if damage is found and clarifies inspection methods and applicability based on engine and thrust reverser configurations. The AD also specifies service bulletins to be used for compliance and updates applicability criteria for affected airplanes.

Why it matters

This AD is critical for aviation professionals because damaged engine control wiring can lead to in-flight engine shutdown or loss of thrust control, compromising flight safety. Operators and maintenance teams must ensure compliance to prevent potential engine failures and maintain aircraft controllability. The directive provides clear instructions to mitigate risks associated with wiring damage in the engine nacelle area.

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