# SDR ASAA1159135

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2011
- Submitted: March 3, 2011
- Operation: Air carrier
- Aircraft: [N560AS](https://openairdocs.org/aircraft/N560AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35179
- Aircraft time: 17,276 hours, 5,389 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 6087
- Part serial: 660873230
- Condition: Inoperative
- Location: Hydraulic Sys
- Part time: 17,276 hours, 5,389 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1159135

## Discrepancy

NR 1 ENGINE DRIVEN HYD PUMP DOES NOT DEPRESSURIZE WHEN SWITCH IS TURNED OFF.   REPLACED NR 1 ENGINE DRIVEN HYDRAULIC PUMP PER MM 29-11-11-000-802-002-2 AND MM 29-11-11-400-802-002-2.  PERFORMED NR 1 ENGINE DRIVEN HYDRAULIC PUMP INSTALLATION TEST REF MM 29-11-11-400-802-002-2 STEP G CHECKS GOOD.

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