# SDR 07FDEA02739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2007
- Submitted: August 6, 2007
- Operation: Air carrier
- Aircraft: [N257FE](https://openairdocs.org/aircraft/N257FE), registered now
- Make and model: Boeing 727233
- Aircraft serial: 20939
- Aircraft time: 56,167 hours, 35,418 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 623337
- Part serial: MX342182
- Condition: Cracked
- Location: Hyd System
- Part time: 10,489 hours, 7,455 cycles
- Stage of operation: LD
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/07FDEA02739

## Discrepancy

APPROX 30 SECS AFTER GOING TO FLAPS 30.  TOTAL LOSS OF A HYDRAULIC SYSTEM.  ALTERNATE FLAP SYSTEM USED TO RAISE FLAPS TO 15.  GPWS SYSTEM INHIBITED.  PER CREW DEBRIEF, BOTH HYDRAULIC PUMPS WERE SHUT OFF IMMEDIATELY AFTER PRESSURE LOSS.  FOUND NR 1 ENG DRIVEN HYD PUMP CRACKED.  REMOVED AND REPLACED NR 1 ENG DRIVEN HYDRO PUMP AND HYD CASE DRAIN.  FILTER MANIFOLD ASSY REF M/M 29-11-033-4 AND M/M 29-11-041-2.  SERV HYDRO.

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