# SDR N93A01052008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2008
- Submitted: May 9, 2008
- Operation: Air carrier
- Aircraft: [N495QS](https://openairdocs.org/aircraft/N495QS), registered now
- Make and model: Gulstm GIV
- Aircraft serial: 1295
- Aircraft time: 10,413 hours, 5,060 cycles
- Engine: Rroyce TAYMK6108
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Transmitter
- Part number: ACA500
- Part serial: LNR
- Condition: Malfunctioned
- Location: Airflow Control
- Part time: 9,922 hours, 4,812 cycles
- Stage of operation: DE
- How discovered: 9
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/N93A01052008

## Discrepancy

DURING DESCENT, AIRCRAFT EXPERIENCED VIBRATION FROM RT ENGINE THAT LASTED  FOR 5 TO 10 SECONDS AND OCCURRED SEVERAL TIMES. TGT ROSE INTO YELLOW BAND. ENGINE WAS PLACED AT IDLE UNTIL LANDING.  REPLACED ENGINE AIRFLOW CONTROL RPM SIGNAL TRANSMITTER.

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