AD 90-21-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Airworthiness Directives; BOEING Model 727-100 and -100C Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Airworthiness Directives; BOEING Model 727-100 and -100C Series Airplanes |
Unsafe Condition
Delamination, cracking, and/or corrosion of fuselage crown skin circumferential joint at body station BS 1080 could lead to depressurization.
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Required Actions
Conduct inspections (internal close visual, external visual, LFEC, HFEC) per Boeing Service Bulletin 727-53-0109, Revision 3, and repair corrosion or cracking prior to further flight if detected. Repeat inspections at specified intervals unless modified per service bulletin parts III, IV, or V.
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Compliance Time
Within the next 15 months after the effective date of this AD, and repeat at intervals not to exceed specified periods (30 months, 15 months, 30 months, 3,000 landings, or 30 months, depending on modification status).
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Affected Aircraft
Boeing Model 727-100 and -100C Series airplanes listed in Boeing Service Bulletin 727-53-0109, Revision 3, dated September 28, 1989, certified 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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