AD 59-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Twin Commander Aircraft LLC | 500 | Airworthiness Directives; Aero Commander Model 500 Aircraft |
Unsafe Condition
Cracks in the elevator front spar in the area of the outboard hinge brackets.
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Required Actions
Inspect each elevator front spar in the area of the outboard hinge brackets for cracks, requiring removal of the elevator outboard hinge brackets. If no cracks are found, modify the horizontal stabilizer by installing lead weights using Aero Design Company Kit No. Service Bulletin 57 within 25 flight hours or by May 1, 1959. If cracks are found, rework the spar through Aero Design's Service Department and modify the horizontal stabilizer immediately.
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Compliance Time
Within the next five hours of flight for inspection; modification for aircraft without cracks must be done within 25 flight hours or by May 1, 1959, while those with cracks must be addressed immediately.
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Affected Aircraft
Twin Commander Aircraft LLC Model 500, serial numbers 618 through 724 except 700 and 718.
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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