# SDR AALA20160707001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 6, 2016
- Submitted: July 8, 2016
- Operation: Air carrier
- Aircraft: [N917NN](https://openairdocs.org/aircraft/N917NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29572
- Aircraft time: 11,358 hours, 4,457 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Drain Valve
- Part number: 3111794
- Part serial: 36444
- Condition: Failed
- Location: Hyd System
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20160707001

## Discrepancy

RT ENG LOW PRESSURE HYD PUMP LIGHT ON DURING CLIMB.  RT ELECTRIC PUMP LOW PRESSURE LIGHT WITH COMPLETE LOSS OF SYSTEM B HYD PRESSURED FLUID.  EMERGENCY DECLARED, RETURNED TO DEPARTURE, AND LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS GROUNDED.   REPLACED HYDRAULIC SYSTEM B RESERVOIR DRAIN VALVE DUE TO LEAK. ALSO REPLACED RT ENGINE DRIVEN HYDRAULIC PUMP.

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