SDR USAAD97232

Service difficulty report · Pump · Doug DC931

Difficulty date: December 10, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N960VJ
Make and model: Doug DC931
Aircraft serial: 47505
System (JASC): 2913 · Hydraulic Pump (Electric/Engine), Main
Part: Pump
Part number: 4566M37B046NY
Condition: Failed
Location: Lt Engine
Stage of operation: CL
Nature of condition: J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PIT - LT 1165 - AFTER TAKEOFF DURING CLIMB-OUT, THE LEFT HYDRAULIC PRESSURE WENT TO ZERO. THE HYDRAULIC QUANTITY REMAINED NORMAL. THE FLIGHT RETURNED TO THE FIELD. MAINTENANCE REPLACED THE LEFT ENGINE DRIVEN HYDRAULIC PUMP, THE INPUT SHAFT WAS SHEARED. NO CONTAMINATION WAS FOUND IN THE FILTERS.

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