AD 81-15-06
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
Jamming of the crew compartment overhead hatch assembly due to cracks in Rack Pin Assemblies P/N's H759-47, -49, -51, -93.
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Required Actions
Magnetic particle inspect Rack Pin Assemblies P/N's H759-47, -49, -51, -93 within 90 days of the effective date. Discard cracked assemblies and identify crack-free ones per Boeing Alert Service Bulletin. Inspect new installations prior to use.
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Compliance Time
within 90 days of the effective date of this AD
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Affected Aircraft
All Model 747 series airplanes listed in Boeing Alert Service Bulletin No. 747-52A2180 Revision 1, or later FAA approved revisions.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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