# SDR 2023FA0000149

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2023
- Submitted: March 21, 2023
- Operation: General aviation
- Aircraft: [N118EB](https://openairdocs.org/aircraft/N118EB), registered now
- Make and model: Cirrus SR22T
- Registry model: [Cirrus SR22T](https://openairdocs.org/model/cirrus-design-sr22t) (OpenAirDocs)
- Aircraft serial: 1990
- Aircraft time: 449 hours
- Engine: Cont TSIO550K
- Engine time: 449 hours
- Propeller: Hartzl PHCJ3YF1
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Drive Unit
- Part number: 11331804
- Condition: Stripped
- Location: Engine
- Component: A/C Drive Assy
- Component part number: 11331804
- 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/2023FA0000149

## Discrepancy

AFTER AN UNSCHEDULED LANDING BECAUSE OF A LEFT MAGNETO PROBLEM, MAINTENANCE FOUND THE A/C DRIVE PULLEY TO SPLINE SHAFT MISSING 3 OF 4 MOUNTING BOLTS. FOUND THREADS IN PULLEY STRIPPED OUT.

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