AD Amdt-39-9767

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 777-200 Series Airplanes

AD Number
Amdt-39-9767
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 96-NM-205-AD
FR Citation
61 FR 53035

Applicability

TypeManufacturerModelDetails
aircraft Boeing 777-200 Airworthiness Directives; Boeing Model 777-200 Series Airplanes

Unsafe Condition

Contamination of the arming switch contacts of the cargo fire extinguishing system may prevent metered fire bottles from discharging, leading to failure of switches to activate cargo fire extinguishing, fuel, air conditioning, and alternate flap systems.

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

Required Actions

Conduct a one-time inspection to determine switch module serial numbers on the overhead panel and control stand. Replace switch modules with new improved modules as required. Perform repetitive tests of the cargo fire extinguishing system and one-time tests of fuel crossfeed valve, pack, trim air, and alternate flap control switches; repair or replace switch modules if necessary.

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 777-200 series airplanes with specific switch modules on the overhead panel and control stand requiring inspection and replacement.

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 777-200

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