AD 2013-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracks in the skin and surrounding structure under the number 3 very high frequency (VHF) antenna on the lower external surface of the airplane at buttock line 0.0, aft of the main landing gear wheel well, which could result in separation of the antenna from the airplane and rapid depressurization of the airplane.
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Required Actions
Inspect for cracking and corrosion under the number 3 VHF antenna, and take corrective actions if necessary. For certain airplanes, replace bonded skin panels with solid skin panels if not previously accomplished. An optional preventive modification is also provided, which would terminate the inspection requirements for certain airplanes.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company Model 737-200, -200C, -300, -400, and -500 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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