AD 2020-05-24

final rule
Data completeness: 80%

Airworthiness Directives; The Boeing Company Airplanes

AD Number
2020-05-24
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. FAA-2019-0602
FR Citation
85 FR 15930

Applicability

TypeManufacturerModelDetails
aircraft Boeing Company Airworthiness Directives; The Boeing Company Airplanes

Unsafe Condition

The potential for a fire from entering the cowl or strut area, which could weaken T/R parts and result in reduced structural integrity of the T/R, possible separation of T/R parts during flight, and consequent damage to the airplane, injury to people, and damage to property on the ground.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Installing a new insulation blanket on the latch beam firewall of each T/R half, and for those airplanes, an inspection to determine if the installed T/R has an affected part number and, if an affected part number is found, installation of a new insulation blanket.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

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Affected Aircraft

The Boeing Company Model 777-200 series airplanes equipped with GE90-76B, -85B, -90B, or -94B engines.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 4, 2026

Rights: U.S. Government Public Domain

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