# SDR RYNA200906170007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2009
- Submitted: June 17, 2009
- Operation: Air carrier
- Aircraft: N123DN
- Make and model: Boeing 767332
- Aircraft serial: 23437
- Aircraft time: 65,718 hours, 30,289 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: B-Nut
- Part number: 312T10006
- Condition: Loose
- Location: Hydraulic Pump
- Stage of operation: CR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/RYNA200906170007

## Discrepancy

LEFT HYDRAULIC SYSTEM PRESSURE, RUDDER RATIO, LEFT HYDRAULIC QUANTITY, YAW DAMPER, AND SPOILER EICAS MESSAGES.  TIGHTENED B NUT THAT BACKED OFF ON NR 1 ENGINE HYDRAULIC PUMP.  REMOVED AND REPLACED PRESSURE, CASE DRAIN AND RETURN FILTERS.

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