# SDR IPXA2016052703910

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 26, 2016
- Submitted: May 31, 2016
- Operation: Air carrier
- Aircraft: [N581UP](https://openairdocs.org/aircraft/N581UP), registered now
- Make and model: Boeing 747-4R7F
- Registry model: [Boeing 747-4R7F](https://openairdocs.org/model/boeing-747-4r7f) (OpenAirDocs)
- Aircraft serial: 25866
- Aircraft time: 102,492 hours, 17,299 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Drive Assy
- Condition: Inoperative
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2016052703910

## Discrepancy

HYDRAULIC PRESSURE SYS NR 1 DURING CRUISE.  SYNOPTICS SHOWED ALL PUMPS INOPERATIVE. EMERGENCY DECLARED.  R & R ADP TURBINE DRIVE IAW AMM 29-11-08-401.  R & R ADP ASSY IAW AMM 29-11-17-401.  LEAK AND OPS CHECK GOOD.

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