# SDR 99ZZZX1381

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N1622](https://openairdocs.org/aircraft/N1622), registered now
- Make and model: Cndair CL6002B16
- Aircraft serial: 5077
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 6310806
- Condition: Failed
- Location: Hydraulic System
- Part time: 602 hours
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX1381

## Discrepancy

DURING FLIGHT, CREW NOTICED A COMPLETE LOSS OF PRESSURE ON THE NR 3 HYDRAULIC SYSTEM, SUBSEQUENTLY, MAKING A PRECAUTIONARY UNSCHEDULED LANDING WITHOUT INCIDENT.  AS HALF OF THE MAIN WHEEL BRAKES OPERATE FROM THE NR 3 HYDRAULIC SYSTEM AND THE OTHER HALF OPERATE FROM THE NR 2 SYSTEM, THIS LEFT ONLY HALF OF BRAKING SYSTEM TO STOP ACFT.  INSP AND T/S REVEALED A SHAFT SEAL ON THE NR 3 HYDRAULIC MECHANICAL PUMP AND MOTOR ASSY WAS LEAKING DUE TO FAILING AND LOOSE MOTOR BEARING.  REMOVED AND REPLACED NR 3 HYDRAULIC PUMP, PN 63108-06 AND MOTOR ASSY, PN 9008015-2; INSTALLING REPAIRED AND OVERHAULED UNITS.

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