Airworthiness DirectiveEASA AD US-2018-14-02

Superseded by FAA AD 2020-22-10

Published: Aug 1, 2018
Effective: Aug 13, 2018
Deadline: Aug 13, 2018

Boeing 777 200 200LR 300 300ER

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

What to do

Operators of affected Boeing 777-200, -200LR, -300, and -300ER airplanes must perform a general visual inspection for foam insulation on the dripshield above the overhead panel support structure within the compliance times specified in Boeing Special Attention Service Bulletin 777-25-0621, Revision 1. If foam degradation is found, replacement is required. For certain airplanes, replacement of foam insulation on the overhead panel support structure is also mandatory. All actions must be completed by August 13, 2018, the effective date of the AD.

Summary

FAA Airworthiness Directive 2018-14-02 is a final rule applicable to certain Boeing Company Model 777-200, -200LR, -300, and -300ER series airplanes. It addresses the presence and condition of Boeing Material Specification 8-39 flexible urethane foam insulation in specific areas of these aircraft. The directive mandates inspections and, if necessary, replacement of foam insulation on the dripshield above the overhead panel support structure and, for some airplanes, on the overhead panel support structure itself.

What changed

This new airworthiness directive introduces mandatory inspections for foam insulation on the dripshield above the overhead panel support structure and requires replacement if degradation is found. For certain Boeing 777 models, it also requires replacement of foam insulation on the overhead panel support structure. The AD incorporates Boeing Special Attention Service Bulletin 777-25-0621, Revision 1, dated August 4, 2017, as the basis for compliance.

Why it matters

This AD is critical for aviation professionals because degraded foam insulation can increase the risk of uncontrolled fire in areas not covered by existing smoke detection or fire protection systems. Compliance ensures enhanced safety by mitigating potential fire hazards that could lead to loss of airplane control. Operators and maintenance organizations must address these risks promptly to maintain airworthiness and regulatory compliance.

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