AD 83-08-02
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
Trailing edge flap track fuse bolt failures
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Required Actions
Within 400 landings after the effective date, inspect bolts listed in Table I for deformation and failure. Replace deformed or failed bolts prior to further flight and retorque acceptable bolts. Replace forward fuse bolts on specified flap tracks with redesigned bolts within 200 landings or prior to specified thresholds. Use FAA-approved service bulletins.
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Compliance Time
Within 400 landings after the effective date of this AD, unless accomplished within the last 1600 landings, and at intervals not to exceed 2000 landings until replacement is done. Replacement must be within 200 landings after the effective date or prior to thresholds in the service bulletins, whichever is later.
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Affected Aircraft
Boeing Model 747 series airplanes certificated in categories listed in Boeing Service Bulletins 747-57-2206 and 747-57-2217, divided into eight groups for SB 747-57-2206-R1 and three groups for SB 747-57-2217-R1.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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