AD 77-13-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 58P | Airworthiness Directives; BEECH Models 58P and 58PA, 58TC and 58TCA Airplanes |
| aircraft | Textron Aviation Inc. | 58PA | Airworthiness Directives; BEECH Models 58P and 58PA, 58TC and 58TCA Airplanes |
| aircraft | Textron Aviation Inc. | 58TC | Airworthiness Directives; BEECH Models 58P and 58PA, 58TC and 58TCA Airplanes |
| aircraft | Textron Aviation Inc. | 58TCA | Airworthiness Directives; BEECH Models 58P and 58PA, 58TC and 58TCA Airplanes |
Unsafe Condition
Cracks initiating from rivet holes attaching turbocharger air intercooler mounting brackets on right truss tube assemblies and chafing or structural weakening on left truss tube assemblies could compromise structural integrity of engine nacelles.
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Required Actions
Inspect right truss tube assemblies for cracks via dye penetrant inspection prior to next flight and every 50 hours until Kit No. 102-9001-1S is installed. Inspect left truss tube assemblies for chafing and cracks, replacing cracked parts before next flight. For aircraft with Kit No. 102-9001-1S or newer serial numbers, conduct comprehensive visual and dye penetrant inspections within 100 hours after AD effective date or last inspection, then every 100 hours. Replace cracked assemblies before flight. Adjust inspection intervals up to 10% as needed, except initial inspection.
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Compliance Time
Prior to next flight for initial inspection on affected models without Kit No. 102-9001-1S; within 100 hours' time in service after AD effective date or last inspection for others, with subsequent intervals at 50 or 100 hours as specified.
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Affected Aircraft
BEECH Models 58P (S/N TJ-2 thru TJ-117), 58PA, 58TC (S/N TK-1 thru TK-63), and 58TCA airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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