# SDR QMLA2017071017065

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2017
- Submitted: July 11, 2017
- Operation: Air carrier
- Aircraft: [N145HH](https://openairdocs.org/aircraft/N145HH), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9236
- Aircraft time: 3,390 hours, 16,900 cycles
- Engine: Tmeca ARRIEL1E2
- Engine time: 3,390 hours, 9,123 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Switch
- Part number: T40191
- Condition: Failed
- Location: Pilot Collective
- Part time: 3,390 hours, 16,900 cycles
- Stage of operation: AA
- How discovered: V
- Nature of condition: J, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2017071017065

## Discrepancy

WHILE ENROUTE, AIRCRAFT HAD A VARNR LIGHT ILLUMINATE AND EXPERIENCED AN APPROXIMATE 30% ENGINE SPLIT WITH NR 2 ENGINE GOING LOW. AIRCRAFT VARTOM’S SYSTEM WENT INTO MANUAL MODE. PILOT ATTEMPTED TO BEEP UP THE NR 2 ENGINE WITH COLLECTIVE TRIM SWITCH WITH NEGATIVE RESULTS.  COLLECTIVE TRIM SWITCH WOULD ONLY INCREASE THE NR 1 ENGINE, WHICH WAS ONLY DONE MOMENTARILY TO CHECK IF SWITCH WAS WORKING. THE NR 2 ENGINE WOULD NOT RESPOND TO COLLECTIVE TRIM SWITCH. ELECTED TO DO A RUN ON LANDING AS A PRECAUTION IN ORDER TO NOT EXCEED ANY LIMITATIONS ON THE NR 1 ENGINE. NO DAMAGE TO AIRCRAFT AND NO LIMITATIONS EXCEEDED.

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