# SDR UALA2011081204234

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2011
- Submitted: September 2, 2011
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 51,263 hours, 6,088 cycles
- Engine: Pwa PW4056
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Circuit Card
- Part number: 285U0032202
- Part serial: D01978
- Condition: Faulty
- Location: Hydraulic Sys
- Stage of operation: CR
- 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/UALA2011081204234

## Discrepancy

NR 4 ENG HYD PUMP EICAS, FLIGHT DIVERTED.  DUE TO HYD QTY, GEAR MONITOR AND LOW QTY MSG RPL'D THE #4 HYDIM CARD PER MM. ALL MSGS CLEARED AND HYDIM 4 TEST PASSED.

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