# SDR UALA2011022800975

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2011
- Submitted: March 14, 2011
- Operation: Air carrier
- Aircraft: N180UA
- Make and model: Boeing 747422
- Aircraft serial: 25224
- Aircraft time: 83,363 hours, 10,054 cycles
- Engine: Pwa PW4056
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Part number: AS115100192
- Condition: Leaking
- Location: Hyd System
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011022800975

## Discrepancy

HYD FLUID RUNNING LEAK FROM NR 4 PYLON AREA DURING PRESSURIZE HYD SYSTEM FOR DEPARTURE. FOUND HYD LEAK FROM NR 4 AC PUMP LINE. REPLACED NR 4 AC HYD PUMP RETURN LINE. OPS & LEAK CHECKED GOOD.

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