AD 91-15-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 58 | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | 58A | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | 95-C55 | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | 95-C55A | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | D55 | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | D55A | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | E55 | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
| aircraft | Textron Aviation Inc. | E55A | Airworthiness Directives; Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58 and 58A Airplanes |
Unsafe Condition
Cracked engine mounts may cause severe engine vibration and possible separation of the engine from the airplane.
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Required Actions
Inspect each engine mount in accordance with Beech SB No. 2362, Revision 1. If cracks are found, remove the engine and mount, perform magnetic particle inspection, and either repair with Kit 58-9007-1S if crack length ≤0.52 inches or replace with P/N 96-910010-67 if crack length >0.52 inches. Repeat inspections every 100 hours TIS unless terminated by repair or replacement.
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Compliance Time
Within 600 hours time-in-service (TIS) or within 100 hours TIS after the effective date of this AD (September 3, 1991), whichever occurs later.
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Affected Aircraft
Beech Models 95-C55, 95-C55A, D55, D55A, E55, E55A, 58, and 58A airplanes with serial numbers: TC350, TE-1 through TE-1201 (Models 95-C55, 95-C55A, D55, D55A, E55, E55A), and TH-1 through TH-1610 (Models 58 and 58A).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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