# SDR USAA2011101100014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2011
- Submitted: October 11, 2011
- Operation: Air carrier
- Aircraft: [N545UW](https://openairdocs.org/aircraft/N545UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4850
- Aircraft time: 59 hours, 24 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: B-Nut
- Condition: Loose
- Location: Hydraulic Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2011101100014

## Discrepancy

CREW REPORTED GREEN HYDRAULIC RESERVOIR LOW LEVEL MESSAGE FOLLOWED BY SYSTEM LOW PRESSURE 30 MINUTES AFTER TAKEOFF.  PER ECAM PROCEDURES, THE POWER TRANSFER UNIT & GREEN HYDRAULIC PUMP WERE SELECTED OFF.  FLIGHT CONTINUED TO PHX WHERE CREW DECLARED AN EMERGENCY, LANDED WITHOUT INCIDENT & TAXIED TO GATE.  MAINTENANCE FOUND NR 1 ENGINE CASE DRAIN HYDRAULIC LINE TO HYDRAULIC CONTROL UNIT LOOSE - TIGHTENED B-NUT IAW AIRBUS MAINTENANCE MANUAL 29-11-49.

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