AD 64-15-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 720 Series | BOEING Models 720 and 720B Series Aircraft |
| aircraft | The Boeing Company | 720B Series | BOEING Models 720 and 720B Series Aircraft |
Unsafe Condition
Cracks have occurred in the inboard wing upper skin just aft of the front spar and inboard of the inboard nacelle overwing support fitting at approximately front spar Station 405. The cracks found were generally in a chord-wise direction.
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Required Actions
Inspect visually or by dye penetrant method for cracks in the upper wing skin per Boeing Service Bulletin No. 1983(R-1). Repair detected cracks per Boeing Drawing 65-40293 or approved repair before further flight. Repetitive inspections may be discontinued after rework per Part II of the same service bulletin.
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Compliance Time
within 250 hours' time in service after the effective date of this AD for aircraft with 5,000 or more hours' time in service, and prior to the accumulation of 5,250 hours' time in service for aircraft with less than 5,000 hours' time in service, unless already accomplished, and thereafter at periods not to exceed 600 hours' time in service from the last inspection
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Affected Aircraft
Boeing Models 720 and 720B Series Aircraft
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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