# SDR HNAA2017051200162

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2017
- Submitted: May 18, 2017
- Operation: Air carrier
- Aircraft: N328EN
- Make and model: Dhav DHC8311
- Aircraft serial: 281
- Aircraft time: 47,795 hours, 69,614 cycles
- Engine: Pwa PW123
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Ecu
- Condition: Malfunctioned
- Location: Nr 1 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2017051200162

## Discrepancy

AT FLIGHT LEVEL 9000 FT,  NR 1 TORQUE ROLLED BACK 25%.  THEN WENT BACK TO NORMAL AND REPEATED.   RETURN TO FIELD.  REMOVED AND REPLACED THE NR 1 ECU IAW SRT MANUAL, OPS CHECKED GOOD.  OK FOR SERVICE.

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