AD 66-14-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Thrush Aircraft, Inc. | 600-S-2C | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2B | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2C | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2A | Airworthiness Directives; Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes |
Unsafe Condition
Fatigue cracks in the lower spar cap of the wing main spar.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install modified wing center splice in accordance with Snow Service Letter No. 29 or an equivalent approved by the FAA. Install wing lower steel spar caps in accordance with Snow Drawing No. 5-1089, Revision D, or an equivalent approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated, unless already accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Aero Commander Models S-2A, S-2B, S-2C, and 600 S-2C Airplanes with specific serial ranges and engine power ratings as outlined in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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