# SDR UIEA2015100500571

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2015
- Submitted: October 7, 2015
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 65,407 hours, 10,204 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic Line
- Part number: 272U4800123
- Condition: Leaking
- Location: Hydraulic Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2015100500571

## Discrepancy

DURING CRUISE EICAS MSG HYD QTY LOW.  FOLLOWED QRH PROCEDURE, FLUID LOSS STOPPED AT ENG DRIVEN & DEMAND PUMPS ONE OFF.  ON BASE LEG ENG & DEMAND PUMPS ONE WERE TURNED ON IAW QRH PROCEDURE AFTER GEAR & FLAPS DOWN QTY CONTINUED TO DROP.  NOSE WHEEL & BODY GEAR STEERING WORKED TO SHUT DOWN.  QTY AT SHUTDOWN WAS .02, FOUND HYD SYS NR 1 PRESS LINE TO C ELEVATOR AUTOPILOT SERVO LEAKING DUE TO PIN HOLE & CRACK.  R & R LINE PN 272U4800-123 WITH FLEX HOSE ASSEMBLY IAW GMM 3.27.1 & AMM 20-11-05.  SERVICED NR 1 SYS IAW AMM 12-17-01.  PERFORMED HYD SYS PRESS LEAK CHECK & FILTER INSPECTION IAW AMM 29-11-07 & SYS 1 OPERATIONS CHECKED OK.  AREA CLEANED A AUTOPILOT ELEVATOR SERVO.  OPERATIONS CHECKED OK IAW AMM 22-15-01.

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