AD 70-24-02
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
Loss of main landing gear wheels during airplane takeoff due to outboard bearing Timken Part No. LM 229139 with code letter 'A' through 'F'.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine the coding identification of the outboard bearing Timken Part No. LM 229139 in all landing gear wheels. Replace any bearing with code letter 'A' through 'F' with a bearing with code letter 'G' or later or an equivalent bearing approved by the Chief, Aircraft Engineering Division, Western Region before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 125 hours time in service after receipt of this telegram
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing 747-100 Series, 747-100B Series, 747-100B SUD Series, 747-200B Series, 747-200C Series, and other 747 models as listed in the AD.
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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