AD 2013-07-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Crew oxygen mask stowage box units may have been delivered with a burr in the inlet fitting, which might break loose during test or operation, posing an ignition source or causing an inlet valve to jam.
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Required Actions
Inspect affected serial numbers of the crew oxygen mask stowage box units. Replace or re-identify the units as necessary. Install new or serviceable crew oxygen mask stowage box units. Identify and label certain units that have already been inspected and reworked by the supplier.
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Compliance Time
Within 50 flight hours after the effective date of this AD.
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Affected Aircraft
The Boeing Company Model 737-700, -700C, -800, and -900ER series airplanes; Model 747-400F series airplanes; and Model 767-200 and -300 series airplanes, as identified in specific Boeing Alert Service Bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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