AD 90-15-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
Unsafe Condition
Rapid decompression of the airplane due to cracks, distortions, loose, missing, or damaged fasteners in the nose wheel well vertical beams and side walls.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform internal and external detailed visual inspections of the nose wheel well vertical beams and side walls for cracks, distortions, loose, missing, or damaged fasteners. Repairs, replacements, and inspections must be done prior to further flight as per Boeing Alert Service Bulletin 747-53A2338.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 flight cycles or 30 days, whichever occurs first, upon the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes, line numbers 001 through 685, certificated in any category, with over 15,000 flight cycles upon the effective date and not yet compliant with AD 90-06-14 R1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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