# SDR 29GA2018071600001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2018
- Submitted: July 16, 2018
- Operation: Air carrier
- Aircraft: N343AG
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B443
- Aircraft time: 37,393 hours, 42,012 cycles
- Engine: Ge CT79B
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Computer
- Part number: 8542142
- Part serial: 540
- Condition: Failed
- Location: Autocoursen Sys
- Stage of operation: TO
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/29GA2018071600001

## Discrepancy

FLIGHT 0084 ELH/ELH REPORT: AT COMMAND TO SET POWER PRIOR TO APR SWITCH BING ENGAGED, LEFT ENGINE SURGED TORQUE ROSE AND THEN TORQUE DROPPED SUDDENLY. LEFT ENGINE OIL PRESSURE ILLUMINATED SMOKE IN CABIN. R&R AUTOCOARSEN COMPUTER, AND AUTOCOURSEN SWITCHER UNIT IAW AMM 61-22-15, AMM 61-22-05 OPS CHECK SATISFACTORY OPS CHECK GOOD.

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