AD Amdt-39-15029

final rule
Data completeness: 80%

Airworthiness Directives; Boeing Model 777 Airplanes

AD Number
Amdt-39-15029
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. FAA-2007-27898
FR Citation
72 FR 19380

Applicability

TypeManufacturerModelDetails
aircraft Boeing 777 Airworthiness Directives; Boeing Model 777 Airplanes

Unsafe Condition

An air supply and cabin pressure controller (ASCPC) failure during flight could stop airflow into the airplane, inhibit the cabin altitude warning message, and cause an incorrect display of cabin altitude, potentially leading to depressurization without warning.

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

Required Actions

Inspect the left and right ASCPCs to determine their part numbers within 90 days. For airplanes with ASCPC P/N 1152972-4, install new ASCPC operational program software (OPS) within 90 days. Prohibit installation of certain OPS versions (P/Ns 3673-GRS-101-00, 3670-GRS-102-00, 3671-GRS-103-00).

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

Compliance Time

Within 90 days after the effective date of this AD.

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

Affected Aircraft

All Boeing Model 777-200, -200LR, -300, and -300ER series airplanes, certificated in any category.

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

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

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