# SDR II9A20120719001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2012
- Submitted: July 21, 2012
- Operation: Air carrier
- Aircraft: [N228ST](https://openairdocs.org/aircraft/N228ST), registered now
- Make and model: Dorner DO228212
- Aircraft serial: 8240
- Propeller: Hartzl HCB4TN5
- System (JASC): [6140 · Propeller Indication System](https://openairdocs.org/jasc/6140)
- Part: Tach Generator
- Part number: AG34
- Part serial: D37649
- Condition: Defective
- Location: Lt Propeller
- Part time: 939 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/II9A20120719001

## Discrepancy

RPM DECREASED AND FLUCTUATING LEFT ENGINE.  SHUT ENGINE DOWN AS PRECAUTION.

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