# SDR ASAA0873216

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2008
- Submitted: July 28, 2008
- Operation: Air carrier
- Aircraft: [N626AS](https://openairdocs.org/aircraft/N626AS), registered now
- Make and model: Boeing 737790
- Aircraft serial: 30793
- Aircraft time: 27,990 hours, 12,023 cycles
- Engine: Ge CFM567B24
- Engine time: 25,297 hours, 9,933 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 66087
- Part serial: K1491
- Condition: Failed
- Location: Hyd System
- Part time: 16,809 hours, 6,793 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/ASAA0873216

## Discrepancy

ON CLIMBOUT AT APPROX FL260 MASTER CAUTION LIGHT ILLUMINATED.  NR 1 ENG DRIVEN HYD PUMP LOW PRESS. LIGHT ILLUMINATED NR 1 HYDRAULIC QTY INDICATED 60 PERCENT MOMENTARILY, EVENTUALLY THIS READING RETURNED TO 106 PERCENT AND REMAINED STABLE RAN QRH CHECKLIST NR1 HYD ENG PUMP REMOVED NR 1 ENG EDP REF MM 29-11-11-000-802-002-2 THROUGH 29-11-11-000-802-002-2 P5 STEP 7 PUT CAPSON THE RETURN & CASE DRAIN BUT WILL NOT HOLD PRESSURE INSTALLED NR 1 ENG EDP IAW MM 29-11-11-400.  OPS AND LEAK CHECK GOOD.  ACCOMPLISHED TSR NR 0811960 FLUSHED OUT 'A' SYS HYD REF MM 29-11-00-170-801.  OPS & LEAK CHECK GOOD.

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