AD 99-15-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 777-200 Series | Airworthiness Directives; BOEING Model 777 Series Airplanes |
| aircraft | The Boeing Company | 777-300 Series | Airworthiness Directives; BOEING Model 777 Series Airplanes |
Unsafe Condition
Failure of the engine-driven pump (EDP) supply shutoff valve due to corrosion in the direct current (DC) motor in the shutoff valve, which could result in an uncontrolled fire in the engine compartment during an engine fire.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the EDP supply shutoff valve (Boeing part number S271W741-21) with a new valve (Boeing part number S271W741-22) within 90 days after the effective date of this AD, following Boeing Alert Service Bulletin 777-29A0022, Revision 1. Use the specified procedures or approved equivalent methods.
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
Boeing Model 777-200 and 777-300 series airplanes equipped with EDP supply shutoff valve part number S271W741-21.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.