# SDR X2ZR202607283587

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2025
- Submitted: July 29, 2026
- Operation: General aviation
- Filed by: [Turbine Standard Ltd, repair station X2ZR927X](https://openairdocs.org/faa-repair-station/X2ZR927X/turbine-standard-ltd.md) (OpenAirDocs)
- Engine: Garrtt TPE33112UHR
- System (JASC): [7321 · Fuel Control/Turbine Engines](https://openairdocs.org/jasc/7321)
- Part: Drive Shaft
- Part number: 3499096
- Condition: Worn
- Location: Fuel Control
- Component: Fuel Control
- Component part number: 8978012
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/X2ZR202607283587

## Discrepancy

FUEL CONTROL UNIT P/N 897801-2, S/N: 2122481 WAS RECEIVED FOR PRECAUTIONARY SPLINE INSPECTIONS DUE TO CUSTOMER REPORTED ACCELERATED STUB SHAFT SPLINE WEAR. DISASSEMBLY AND INSPECTION REVEALED STUB DRIVE SHAFT P/N 3499-096 WITH ACCELERATED WEAR ON INTERNAL SPLINES.

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