AD 2016-25-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The absence of inspection or repair procedures in AD 2012-22-02 for airplanes with a STA 320 crown frame web thickness less than 0.078 inch, or greater than or equal to 0.084 inch and less than or equal to 0.135 inch, could lead to complete fracture of the crown frame assembly and consequent damage to the skin, potentially resulting in in-flight decompression.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the crown frame web, including related investigative and corrective actions if necessary. Retain the measurement, inspection, and web replacement actions from AD 2012-22-02. Perform a post-replacement inspection as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the compliance times specified in the referenced service bulletin, unless already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
The Boeing Company Model 747-400, -400D, and -400F series airplanes, as specified in Boeing Alert Service Bulletin 747-53A2784, Revision 2, dated August 20, 2015.
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.