AD 2012-12-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Reports of cracks found on the center section ribs of the horizontal stabilizers. Cracking in the left and right bearing lugs of the rib hinge spreading at the same time, which could result in failure of both hinge bearing lugs.
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Required Actions
Conduct repetitive Eddy Current High Frequency (ETHF) inspections for cracks on the aft face of the left and right rib hinge bearing lugs of the center section of the horizontal stabilizer. Measure cracks, perform repairs, conduct post-repair repetitive inspections, and install a new center section rib if necessary.
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Compliance Time
Before the accumulation of 35,000 total flight cycles, or within 8,275 flight cycles after the effective date of this AD, whichever occurs later.
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Affected Aircraft
All The Boeing Company Model 717-200 airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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