# SDR 95ZZZX1745

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N92EC](https://openairdocs.org/aircraft/N92EC), registered now
- Make and model: Lear 31A
- Registry model: [Lear 31A](https://openairdocs.org/model/learjet-31a) (OpenAirDocs)
- Aircraft serial: 024
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Condition: B-Nut Loose
- Location: Gear Retract
- Part time: 725 hours
- Stage of operation: CR
- Nature of condition: J, K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX1745

## Discrepancy

ON A FLIGHT FROM RIC TO RDU WITH RDU IN SIGHT, HYDRAULIC PRESSURE WENT TO ZERO.  GEAR WAS BLOWN DOWN.  CHECK LIST FOLLOWED FOR A NO-HYDRAULIC PRESSURE LANDING.  FLUID WAS EVIDENT IN NOSE WHEELWELL.  MAINTENANCE TECHNICIANS DETERMINED ONLY PARTIAL LOSS OF FLUID AND PRESSURE ON SYSTEM 10 HOURS LATER.  FOUND A B-NUT FOR NOSE GEAR-UP LINE LOOSE.  TIGHTENED B-NUT.  CYCLED GEAR, RAN ENGINES TO BLEED HYDRAULIC PUMPS.  SYSTEM FUNCTIONED NORMALLY.  SUSPECT CAUSE WAS A LOOSE JAM NUT AT BULKHEAD CONNECTION FROM WHEELWELL TO AVIONICS BAY ALLOWING FITTING TO VIBRATE LOOSE.

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