# SDR UALA2013021800925

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2013
- Submitted: February 19, 2013
- Operation: Air carrier
- Aircraft: N174UA
- Make and model: Boeing 747422
- Aircraft serial: 24381
- Aircraft time: 90,000 hours, 10,029 cycles
- Engine: Pwa PW4056
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Unknown
- Condition: Malfunctioned
- Location: Hydraulic Sys
- Stage of operation: CR
- 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/UALA2013021800925

## Discrepancy

HYDIM 4 REMOVED FOR TROUBLESHOOTING.  ACCOMPLISHED WIRING CHECK FOR SHORTS PER WDM 29-32-11 AND FOUND NO DEFECTS.  REPLACED HYDIM CARD SYS4 A23 PRECAUTIONARY PER MM.

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