AD 90-24-11
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 Body Station 1183 pressure bulkhead web and strap.
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Required Actions
Inspect and repair cracks in the pressure bulkhead web and strap per Boeing Alert Service Bulletin 727-53A0171, revisions 1 or 2. Install vertical reinforcing strap and spacers if repairs used original service bulletin. Replace loose or missing fasteners with protruding head solid fasteners if applicable.
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Compliance Time
Within specified flight cycles based on flight cycle counts as of February 6, 1986: airplanes with 40,000+ flight cycles must comply within next 300 flight cycles (or within last 3,200 if already done), others have varying deadlines up to 30,000 flight cycles or 3,500 after February 6, 1986. Recurrent inspections every 3,500 flight cycles. Immediate repair required if cracks found before further flight.
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Affected Aircraft
All Boeing Model 727 series airplanes 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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