AD 90-20-18
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
Delamination of the upper body skin bonded tear straps from Fuselage Station 277 to Station 1130 and corrosion in delaminated areas.
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Required Actions
Inspect upper body skin bonded tear straps for delamination using ultrasonic methods per Boeing Service Bulletin 727-53-0082. Inspect for corrosion in delaminated areas before further flight. Perform repetitive inspections at intervals not exceeding 24 or 30 months depending on airplane group. Repair delaminations or corrosion exceeding limits, replace blind fasteners with solid fasteners within specified landing limits.
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Compliance Time
Within 14 months from August 20, 1981 (the effective date of Amendment 39-4194), and subsequent intervals as specified.
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Affected Aircraft
Boeing Model 727 series airplanes listed in Boeing Service Bulletin 727-53-0082, Revision 5, dated November 9, 1989.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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