# SDR 2024FA0000372

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2024
- Submitted: May 20, 2024
- Operation: General aviation
- Aircraft: [N175SW](https://openairdocs.org/aircraft/N175SW), registered now
- Make and model: Swrngn SA227AC
- Aircraft serial: AC621B
- Aircraft time: 36,998 hours, 56,515 cycles
- Engine: Garrtt TPE33111U
- Engine time: 36,414 hours, 47,070 cycles
- Propeller: Mtprop MTV271E
- System (JASC): [7700 · Engine Indicating System](https://openairdocs.org/jasc/7700)
- Part: Bearing
- Part number: 3103035AL1
- Part serial: TA43051023
- Condition: Failed
- Location: Torque Sensor
- Part time: 2,125 hours
- Component: Dual Spur Gear
- Component part number: 31035901
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2024FA0000372

## Discrepancy

TORQUE SENSOR BEARING FAILED (PN: 3103585AL-1, SN: TA43-0510123, TSN: 2,125.4). SPECTROMETRIC OIL ANALYSIS PROGRAM RESULT REPORT DISCOVERED M50 PLATELETS, SHINY, >100, UP TO 1.1MMX0.9MM. M50 IS A BEARING RACE MATERIAL AND THE QUANTITY OF PLATELETS FOUND IN THE FILTER ANALYSIS INDICATES A BEATING IS FAILING.

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