# SDR CA000320025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2000
- Submitted: January 22, 2001
- Operation: Air carrier
- Make and model: Boeing 747433
- Aircraft time: 32,274 hours
- Engine: Pwa PW4056
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 1090018
- Condition: Failed
- Location: Hydraulic Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA000320025

## Discrepancy

(CAN) EICAS MESSAGE INDICATING NR 1 HYD SYS FAILURE. AIR DRIVEN PUMP FAILED. EDP UNDER MEL. ALTERNATE SELECTION WAS USED FOR LANDING GEAR. REPLACED ADP AND REACTIVATER EDP BY REPLACING TWO HYD LINES A/C SERVICEABLE.

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