# SDR DXTA2011052604591

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2011
- Submitted: May 26, 2011
- Operation: Air carrier
- Aircraft: [N296QS](https://openairdocs.org/aircraft/N296QS), registered now
- Make and model: Amd FALCON2000
- Aircraft serial: 196
- Aircraft time: 8,264 hours, 5,125 cycles
- Engine: Cfe CFE73811B
- Engine time: 8,223 hours, 5,162 cycles
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 5085T40G04
- Part serial: BECH0631
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Part time: 1,805 hours, 1,117 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2011052604591

## Discrepancy

CLIMBING THROUGH 10,000 FT, A CHANGE IN ENGINE PITCH SOUND.  NR 2 ENGINE FUEL FLOW REPEATEDLY DROPPED 200 PPH FROM NORM & N1 DROPPED ABOUT 2 % FROM NORM.  LASTED 2 SECONDS & WITH 3 DROPS IN 1 MINUTE & INDICATIONS RETURNED TO NORM.  SAME SERIES OF DROPS OCCURED CLIMBING THROUGH 18000 & AT 31,000. LEVELED AT 34,000 & DIVERTED.  AT LEVEL FLT & DESCENT, NO FF OR N1 DROPS. SERIES OF 5 INCIDENTS OF NR 2 ENGINE IGNITION LIGHT ILLUMINATING FOR 2 SECONDS & EXTINGUISHING.  AFTER SHUTDOWN, NR 2 FADEC FLASHED ON & OFF SPORADICALLY.  NO EIED MESSAGES & NO MINELCOS TRIPPED.  REMOVED NR 2 ENGINE HMU AND INSTALLED O/H HMU.  PERFORMED GROUND RUN, LEAK & OPS CHECKS, FUNCTION TESTED OK.  NO DEFECTS NOTED.

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