# SDR LF1R202108200001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 2021
- Submitted: August 20, 2021
- Operation: General aviation
- Filed by: [Pilatus Aircraft USA Ltd., repair station LF1R294K](https://openairdocs.org/faa-repair-station/LF1R294K/pilatus-aircraft-usa-ltd.md) (OpenAirDocs)
- Aircraft: [N992ST](https://openairdocs.org/aircraft/N992ST), registered now
- Make and model: Piper PA46-500TP
- Registry model: [Piper PA46-500TP](https://openairdocs.org/model/piper-pa46-500tp) (OpenAirDocs)
- Aircraft serial: 4698102
- Aircraft time: 407 hours, 309 cycles
- System (JASC): [3097 · Ice/Rain Protection System Wiring](https://openairdocs.org/jasc/3097)
- Part: Wire Harness
- Part number: 105555
- Condition: Chafed
- Location: Prop Heat
- Part time: 107 hours
- Component: Propeller, Hartzl
- Component part number: 5D3N338A1
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/LF1R202108200001

## Discrepancy

PILOT REPORTED THE PROPELLER HEAT CB OPENED AND A PROP HEAT FAIL MESSAGE ILLUMINATED ON THE MFD. ATTEMPTED ONE RESET OF CB WITHOUT SUCCESS. REMOVED SPINNER FOR VISUAL INSPECTION AND FOUND 4 OUT OF 5 PROPELLER HEAT HARNESSES HAD CHAFED THROUGH THE INSULATION CAUSING CONTACT WITH PROP SPINNER. REPLACED THE PROPELLER HEAT HARNESSES WITH NEW UNITS P/N 105555 IAW HARTZELL SB HC-SB-30-375. NOTE: THE REMOVED HARNESSES WERE THE SAME PART NUMBER BUT THE INSTALLATION HAD ALLOWED THE MOVEMENT OF THE HARNESS THAT CONTRIBUTED TO THIS ISSUE.

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