AD 47-26-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 120 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
| aircraft | Cessna Aircraft Company | 140 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
Unsafe Condition
Buckling of the wing leading edge skin due to failed spot welds attaching the skin to the nose ribs, which may result in structural failure of the nose ribs.
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Required Actions
Inspect wing leading edge for skin buckling at nose ribs. Repair or replace buckled nose ribs. Install four Cherry CR 163-4-4 rivets at each nose rib from No. 2 to No. 10 inclusive, with specific hole locations using a template or jig hole references. On recovered wings, drill out existing rivets and install AN 456-AD4 rivets. Install four rivets in each rib midway between fabric attachment clips from No. 1 to No. 5, using pyralin washers. Placard prohibition of acrobatics and reduced cruising speed in rough air must be installed immediately, with compliance to modifications required prior to August 1, 1947.
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Compliance Time
prior to August 1, 1947
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Affected Aircraft
Cessna Model 120 and 140 Aircraft Serial Numbers 8000 to 13777, inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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