AD 88-17-06
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 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 wing upper surface stringers could result in loss of structural integrity of the wing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect wing upper surface stringers for cracks using eddy current, x-ray, or visual inspection techniques per Boeing Alert Service Bulletin 727-57A159, Revision 1. Repeat inspections at intervals based on the method used (22,000 landings for eddy current, 11,000 for x-ray/visual). If cracks are found, inspect stringer-to-rib attachments and repair cracked structure prior to further flight as per Revision 3 of the same service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of specified additional landings after August 16, 1983, depending on the airplane's landing count on that date (1,000, 2,000, or 3,000 additional landings). Repeat inspections must be done within specified landing intervals (22,000 or 11,000 landings). Cracks detected after the AD effective date require inspection prior to further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 727 series airplanes except Model 727-200F, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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