# SDR UALA2013041102483

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2013
- Submitted: May 8, 2013
- Operation: Air carrier
- Aircraft: N545UA
- Make and model: Boeing 757222
- Aircraft serial: 25323
- Aircraft time: 80,627 hours, 23,297 cycles
- Engine: Pwa PW2037
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Condition: Leaking
- Location: Hyd System
- Stage of operation: NR
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013041102483

## Discrepancy

HYDRAULIC QUANTITY DECREASED TO 47. QUANTITY STABLE WITH PUMPS OFF, LEFT SYSTEM.  CONFERENCE WITH CREW FOLLOWING QRH 130.2 FLUID LEAKING FROM ENGINE DRIVEN PUMP CASE DRAIN PRESSURE MODULE.  REPLACED O-RINGS ON DIFFERENTAL PRESSURE INDICATOR, LEAK CHECKED GOOD.  SERVICED SYSTEM TO FULL REF CMM 29-11-13.

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