AD 68-15-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | BOEING Model 727 Series Airplanes |
Unsafe Condition
Cracks in the lower chord of the horizontal stabilizer rear spar at Stabilizer Stations 110.00 through 225.54.
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Required Actions
Inspect for cracks in the lower chord of the horizontal stabilizer rear spar as per Boeing Service Bulletin 55-18(R-2). Repair found cracks before further flight unless flown under FAR 21.197. Modify the area if no cracks are found to discontinue inspections.
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Compliance Time
Within specified intervals based on time in service: initial inspections within 50 or 700 hours' time in service after the effective date, subsequent inspections every 800 hours' time in service.
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Affected Aircraft
Boeing Model 727 Series airplanes listed in Parts I, II, and III of Boeing Service Bulletin No. 55-18(R-6) dated June 15, 1967.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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