AD Amdt-39-10023

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 777 Series Airplanes

AD Number
Amdt-39-10023
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 97-NM-90-AD
FR Citation
62 FR 25837

Applicability

TypeManufacturerModelDetails
aircraft Boeing 777 Airworthiness Directives; Boeing Model 777 Series Airplanes

Unsafe Condition

Failure of the engine fire shutoff switch (EFSS) due to overheating of the solenoid and non-operational override mechanism and switch handle.

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

Required Actions

Conduct repetitive testing of the engine fire shutoff switch (EFSS) to verify override mechanism and switch handle operability. Replace the EFSS if necessary. Install a collar on a specific circuit breaker of the standby power management panel and placards advising flightcrew to push in the override mechanism to pull the fire switch for certain airplanes.

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

Compliance Time

Before further flight

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

Affected Aircraft

Boeing Model 777 series airplanes

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

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Boeing 777

Related Airworthiness Directives

2011-26-03

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2011-09-15

final rule

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Effective: Jun 6, 2011 Category: aircraft

2011-09-11 Recurring

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Airworthiness Directives; The Boeing Company Model 777-200 and -300 Series Airplanes Equipped With Pratt and Whitney Engines

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Effective: Jun 6, 2011 Category: engine

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