AD 90-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
Unsafe Condition
Cracks in the wing center section front spar web could lead to wing structural failure.
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Required Actions
Visually inspect the wing center section for cracks in accordance with Boeing Service Bulletin 727-57-107, Revision 6. If cracks are found, stop-drill cracks, repair as per Boeing Drawing 69-62491-2, or modify per the service bulletin to terminate inspections. Repeat inspections at intervals not exceeding specified landing counts.
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Compliance Time
Prior to the accumulation of 15,000 landings since manufacture or prior to 500 additional landings after September 11, 1986, whichever occurs later.
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Affected Aircraft
Boeing Model 727 series airplanes listed in Boeing Service Bulletin 727-57-0107, Revision 6, dated November 22, 1989, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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