AD 2014-13-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Reports of scribe-line-related fatigue cracks on Model 727 airplanes, which are similar in design to Model 707 airplanes, and Model 720 and 720B series airplanes. Scribe lines can develop into fatigue cracks in the skin and cause rapid decompression of the airplane.
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Required Actions
Inspect the fuselage skin for scribe lines in the skin lap joints, external approved repairs, external features, skin butt joints, and decals. Perform related investigative and corrective actions if scribe lines are found. Restore surface finish before further flight.
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Compliance Time
Within the compliance times specified in Boeing 707 Alert Service Bulletin A3539, dated April 26, 2013.
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Affected Aircraft
The Boeing Company Model 707 airplanes (all series), and Model 720 and 720B series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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