AD 96-23-07 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-81 (MD-81) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-82 (MD-82) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-83 (MD-83) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-87 (MD-87) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | MD-88 | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes |
Unsafe Condition
Fatigue cracking in the vertical leg of the rear spar lower cap of the wing, which could lead to loss of the spar cap and consequent damage to the spar cap web and adjacent wing skin structure, reducing structural integrity of the wing.
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Required Actions
Perform visual/dye penetrant and ultrasonic inspections to detect cracks in the vertical leg of the rear spar lower cap of the wings below and in the adjacent area of the two lower attaching stud holes for the inboard hinge fitting of the outboard flap at station Xrs=164.000, in accordance with McDonnell Douglas MD-80 Service Bulletin 57-184, Revision 1. The inspections must be completed by specific landing thresholds based on the airplane's total landings as of December 19, 1996.
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Compliance Time
Prior to the accumulation of 10,000 landings or within 3,000 landings after December 19, 1996, whichever occurs later (for airplanes with less than 8,000 landings as of December 19, 1996); within 3,000 landings after December 19, 1996 (for 8,000-9,999 landings); within 2,400 landings after December 19, 1996 (for 10,000-14,999 landings); or within 1,800 landings after December 19, 1996 (for 15,000+ landings).
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Affected Aircraft
McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87) series airplanes and Model MD-88 airplanes, as listed in Service Bulletin 57-184, Revision 1, dated December 22, 1994.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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