# SDR Q5QA20161115006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2016
- Submitted: November 15, 2016
- Operation: Air carrier
- Aircraft: [N649DX](https://openairdocs.org/aircraft/N649DX), registered now
- Make and model: Emb EMB-500
- Registry model: [EMB EMB-500](https://openairdocs.org/model/embraer-empresa-brasileira-de-emb-500) (OpenAirDocs)
- Aircraft serial: 50000194
- Aircraft time: 4,789 hours, 6,251 cycles
- Engine: Pwc PW617FE
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 3032988002
- Part serial: MX7759777
- Condition: Failed
- Location: Hydraulic Sys
- Part time: 719 hours, 1,008 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/Q5QA20161115006

## Discrepancy

WHILE CRUISING AT 22,000 FT, PILOT EXPERIENCED HYD AUTO PRESSURE FLUCTUATION BETWEEN 1600/3200. HYD ON, PRESSURE FLUCTUATIONS AND SPIKES TO 3800. HYD OFF, PRESS 0 AND LANDING GEAR FALLS OUT. PILOT LANDED WITH HYD PRESSURE ON AND SEEING PRESSURE FLUCTUATIONS AND SPIKES TO 3800. ALSO DURING PRESSURE FLUCTUATIONS, THUMPING/BUMPING NOISE/VIBRATION AT PILOT FLOOR - FORWARD. INVESTIGATION DISCLOSED THE HYDRAULIC PUMP FAILED.  HYDRAULIC POWER PACK VENTILATION FAN WAS ALSO FOUND FAILED.  REPLACED FAULTY COMPONENTS; OPERATIONAL CHECKS WERE SATISFACTORY.

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