AD 90-11-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
Unsafe Condition
Disablement of the passenger oxygen system due to the passenger oxygen/yaw damper module.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace the passenger oxygen/yaw damper module in accordance with Boeing Alert Service Bulletin 747-35A2067. An alternate means of compliance or adjustment may be used if approved by the Manager, Seattle Aircraft Certification Office.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 500 hours time-in-service after the effective date of this AD, unless previously accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747-400 series airplanes listed in Boeing Alert Service Bulletin 747-35A2067 dated March 15, 1990.
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.