AD 74-19-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-100B Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-200B Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-200C Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-200F Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-300 Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747 Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747 Airplanes |
Unsafe Condition
Cracks in torque tube cranks, Part Numbers 65B05025-1 and -2, 69B02875-1 and -2, and 65B09704-1 on passenger doors Nos. 2, 4, and 5 right- and left-hand sides.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect torque tube cranks for cracks. If no cracks found, apply LPS-3 and retorque cross bolts per Boeing Service Bulletin 747-52-2090. If cracks found, repair or replace per the service bulletin or approved method.
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Compliance Time
Within the next 1200 hours time in-service after the effective date of this AD, unless already accomplished in the last 800 hours time in-service, and at intervals thereafter not to exceed 2,000 hours time in-service
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Affected Aircraft
Boeing Model 747 airplanes, certificated in all categories, affected by Boeing Service Bulletin 747-52-2090
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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