AD 2011-13-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Lycoming | Various | Airworthiness Directives: Lycoming Engines (Type Certificate Previously Held by Textron Lycoming) and Teledyne Continental Motors (TCM) Turbocharged Reciprocating Engines |
| aircraft | Textron | Various | Airworthiness Directives: Lycoming Engines (Type Certificate Previously Held by Textron Lycoming) and Teledyne Continental Motors (TCM) Turbocharged Reciprocating Engines |
| engine | Lycoming | and TCM reciprocating | Airworthiness Directives: Lycoming Engines (Type Certificate Previously Held by Textron Lycoming) and Teledyne Continental Motors (TCM) Turbocharged Reciprocating Engines |
Unsafe Condition
Machining debris left in the cavities of the turbocharger center housing and rotating assembly (CHRA) during manufacture could result in seizure of the turbocharger turbine, leading to engine damage and smoke in the airplane cabin.
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Required Actions
Inspect turbochargers for the presence of machining debris. Disassemble and clean the CHRA cavities of affected turbochargers as specified in Hartzell Engine Technologies, LLC Service Bulletin No. 040, Revision A.
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Compliance Time
Before further flight for turbochargers with less than 50 hours time-in-service on the effective date of the AD.
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Affected Aircraft
Lycoming Engines (Type Certificate Previously Held by Textron Lycoming) and Teledyne Continental Motors (TCM) turbocharged reciprocating engines with certain Hartzell Engine Technologies, LLC (HET) turbocharger models (TA3601, TAO401, TAO402, TAO411, TAO413, T1879, T18A21, T18A44, THO867, TEO659) installed, including specific part numbers listed in Tables 2 and 3 of the AD, and with a 'slanted A' foundry mark on the CHRA.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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