# SDR SAJF20120625021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2012
- Submitted: June 26, 2012
- Operation: Air carrier
- Aircraft: N18712
- Make and model: Boeing 747409F
- Aircraft serial: 33729
- Aircraft time: 37,386 hours, 6,455 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: B-Nut
- Condition: Loose
- Location: Hyd Edp
- Stage of operation: CR
- 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/SAJF20120625021

## Discrepancy

(B18712) HYD-1 QTY LOW 'LESS THAN 0.34' MESSAGE DURING CRUISE.  INSPECTION FOUND EDP NR 1 DAMPER CONNECT HOSE B-NUT LOOSE.  INSPECTED HYD NR 1 PRESSURE MODULE DELTA P INDICATED NORMAL. REPLACED EDP NR 1 & CSAE DRAIN FILTER.  ENG RUN UP TEST NORMAL.

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