AD 2006-16-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-700 and 737-800 | Airworthiness Directives; Boeing Model 737-700 and 737-800 Series Airplanes |
Unsafe Condition
Fatigue cracks discovered during a full-scale fatigue test conducted by the manufacturer, which could result in more extensive fatigue cracking and lead to possible loss of cabin pressure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a high frequency eddy current (HFEC) inspection for cracking of the backup intercostals located above the cutout for the forward airstair door. If any crack is found, do related investigative and corrective actions before further flight. If no crack is found, do other specified corrective actions as per Boeing Special Attention Service Bulletin 737-53-1236, Revision 1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 4,500 flight cycles after the effective date of this AD, or before the accumulation of 24,000 total flight cycles, whichever comes later.
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Affected Aircraft
Boeing Model 737-700 and 737-800 series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 737-53-1236, Revision 1, dated November 10, 2005.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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