AD 2012-12-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; the Boeing Company Airplanes |
Unsafe Condition
The lowered ceiling support structure of Section 41, in airplanes incorporating the overhead space utilization (OSU) option, were found to be under-strength when subjected to a 9.0 g forward load.
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Required Actions
Install new structural members, tie rod(s), and attach fittings on the left and right sides of the lowered ceiling support structure, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-25-0482, Revision 1, dated February 21, 2012.
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Compliance Time
Within 60 months after the effective date of this AD.
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Affected Aircraft
The Boeing Company Model 777-200, -200LR, and -300ER series airplanes, certificated in any category, incorporating the overhead space utilization (OSU) option, as identified in Boeing Special Attention Service Bulletin 777-25-0482, Revision 1, dated February 21, 2012.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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