# SDR CNQ3200903

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2009
- Submitted: December 14, 2009
- Operation: General aviation
- Filed by: [Textron Aviation Inc, repair station CNQ3918C](https://openairdocs.org/faa-repair-station/CNQ3918C/textron-aviation-inc.md) (OpenAirDocs)
- Aircraft: N307RX
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500107
- Aircraft time: 4,053 hours, 2,856 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Plug
- Part number: AN8146J
- Condition: Undertorqued
- Location: Hyd System
- Part time: 4,053 hours, 2,856 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: H, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CNQ3200903

## Discrepancy

AIRCRAFT LOST "B HYD PRESSURE IN FLIGHT AS THE RESULT OF HYD FLUID LOSS. FOUND FLUID TO BE LEAKING FROM PN AN814-6J PLUG, O-RING NAS1612-6 (REF. IPC 29-20-00, FIG.1001, PAGE 1, ITEM 17.) PLUG WAS FOUND TO BE AT LESS THAN SPECIFIED TORQUE.  THIS PLUG IS INSTALLED ON PN 6707005-7 MANIFOLD ASSY-RUDDER STANDBY (REF.IPC 29-20-00, FIG. 1001, PAGE 1, ITEM 1.) O-RING WAS REPLACED, FILTERS CHECKED FOR DEBRIS, SYSTEM BLED AND OPERATIONALLY CHECKED. ACFT WAS RETURNED TO SERVICE.

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