AD 2010-23-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McDonnell Douglas | Corporation Model DC-9-14 | Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes |
Unsafe Condition
Cracking in the vertical radius (vertical leg) of the upper cap of the center wing rear spar, and the horizontal flange on the inboard side of the rear spar upper cap, resulting from stress corrosion.
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Required Actions
Inspect the vertical radius and horizontal flange of the upper cap of the left and right center wing rear spar using high frequency eddy current inspections, in accordance with Boeing Service Bulletin DC9-57-223, Revision 1. Repair any detected cracks.
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Compliance Time
Within 15,000 flight cycles or 5 years after December 20, 2004, whichever occurs first, or before the accumulation of 25,000 total flight cycles.
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Affected Aircraft
McDonnell Douglas Corporation Model DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-33F, DC-9-34, DC-9-34F, DC-9-32F (C-9A, C-9B), DC-9-41, and DC-9-51 airplanes; certificated in any category; as identified in Boeing Service Bulletin DC9-57-223, Revision 1, dated August 13, 2009.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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