# SDR AALA20110505DFW01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2011
- Submitted: May 6, 2011
- Operation: Air carrier
- Aircraft: [N570AA](https://openairdocs.org/aircraft/N570AA), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49352
- Aircraft time: 76,798 hours, 34,132 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 3029981001
- Condition: Failed
- Location: Hydraulic Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20110505DFW01

## Discrepancy

DFW - CREW REPORTED LEFT HYDRAULIC SYSTEM PRESSURE ZERO.  EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED LEFT ENGINE HYDRAULIC PUMP THAT WAS BAD AND FILTERS.  SYSTEM GROUND CHECK NORMAL OPERATION.

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