AD T98-26-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-12 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-21 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-31 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-32 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-33 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-41 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-42 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-43 | McDonnell Douglas Model DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-51 | McDonnell Douglas Model DC-8 Series Airplanes |
Unsafe Condition
Fatigue cracking in the structure of the main deck cargo door, specifically in the frames and inner skin at the latch fitting supports, could lead to severed frames and inner skin at the latch fitting supports, resulting in cabin decompression and loss of the main deck cargo door, and consequent reduced controllability of the airplane.
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Required Actions
Within 24 hours after receipt, revise the AFM to include cabin pressure restrictions. Within 7 days after receipt, perform a detailed visual inspection of the main deck cargo door area for cracking or discrepancies. For airplanes with recent pressurization anomalies, perform the inspection before further flight. Report findings within 24 hours post-inspection or receipt.
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Compliance Time
Effective immediately upon receipt of the AD.
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Affected Aircraft
McDonnell Douglas Model DC-8 Series airplanes modified with Supplemental Type Certificate (STC) SA1802SO for conversion from passenger to cargo configuration.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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