AD 89-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING: Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING: Model 747 Series Airplanes |
Unsafe Condition
Failure of the body skin and the canted pressure bulkhead structure.
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Required Actions
Perform detailed visual inspections and high frequency eddy current inspections of the nose gear wheel well forward lower corners for cracks, in accordance with Boeing Service Bulletin 747-53-2112. Repairs must be made prior to further flight or within specified landing intervals depending on crack visibility and extent.
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Compliance Time
Prior to the accumulation of specified landing intervals (e.g., 4,000, 1,000, 500, or 2,000 landings) or within the next 100 landings after the effective date of this AD, whichever occurs later.
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Affected Aircraft
Boeing Model 747 series airplanes, Groups 1, 2, and 3 as listed in Boeing Service Bulletin 747-53-2112, Revision 4.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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