Narrative:

During preflight inspection, departure and cruise, no problems found and all the aircraft system performed normally. About 25 mi from our destination (pit), descending through 11000 ft, we noticed the hydraulic reservoir contents gauge was fluctuating between empty and 1/8. We ran the checklist and followed the prescribed procedures. ATC was advised we had a hydraulic problem, and delaying vectors were requested to accommodate the various checklists and crew/acmp/cabin crew/passenger briefings. Emergency was not declared, as we did not require priority to the airport. The following was communicated to ATC: nature of the problem and the possible effect on our normal braking system, the need for the rescue and fire vehicles to wait for us upon landing, souls and fuel onboard, and the fact that we will not clear the runway after landing. The gear handle was selected down (normal hydraulic system) and we had 3 greens. Considering the uncertainty of the hydraulic system and the runway length (10500 ft) a zero flap landing was executed uneventfully. Passenger were deplaned onto a bus. During postflt inspection hydraulic fluid was noticed dripping from the left engine. Later, maintenance advised us that the left engine driven hydraulic pump had failed and that was the source of the leak.

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Original NASA ASRS Text

Title: A BA4100 FLC EXPERIENCES A PRIMARY SYS HYD FLUID LOSS. PIC REQUESTS DELAYING VECTORS FOR ARR AND REQUESTS EMER GND EQUIP. HE ALSO FILLS IN APCH CTLR WITH ALL THE OTHER INFO RELATED TO AN EMER SIT BUT NEVER DECLARED AN EMER SIT.

Narrative: DURING PREFLT INSPECTION, DEP AND CRUISE, NO PROBS FOUND AND ALL THE ACFT SYS PERFORMED NORMALLY. ABOUT 25 MI FROM OUR DEST (PIT), DSNDING THROUGH 11000 FT, WE NOTICED THE HYD RESERVOIR CONTENTS GAUGE WAS FLUCTUATING BTWN EMPTY AND 1/8. WE RAN THE CHKLIST AND FOLLOWED THE PRESCRIBED PROCS. ATC WAS ADVISED WE HAD A HYD PROB, AND DELAYING VECTORS WERE REQUESTED TO ACCOMMODATE THE VARIOUS CHKLISTS AND CREW/ACMP/CABIN CREW/PAX BRIEFINGS. EMER WAS NOT DECLARED, AS WE DID NOT REQUIRE PRIORITY TO THE ARPT. THE FOLLOWING WAS COMMUNICATED TO ATC: NATURE OF THE PROB AND THE POSSIBLE EFFECT ON OUR NORMAL BRAKING SYS, THE NEED FOR THE RESCUE AND FIRE VEHICLES TO WAIT FOR US UPON LNDG, SOULS AND FUEL ONBOARD, AND THE FACT THAT WE WILL NOT CLR THE RWY AFTER LNDG. THE GEAR HANDLE WAS SELECTED DOWN (NORMAL HYD SYS) AND WE HAD 3 GREENS. CONSIDERING THE UNCERTAINTY OF THE HYD SYS AND THE RWY LENGTH (10500 FT) A ZERO FLAP LNDG WAS EXECUTED UNEVENTFULLY. PAX WERE DEPLANED ONTO A BUS. DURING POSTFLT INSPECTION HYD FLUID WAS NOTICED DRIPPING FROM THE L ENG. LATER, MAINT ADVISED US THAT THE L ENG DRIVEN HYD PUMP HAD FAILED AND THAT WAS THE SOURCE OF THE LEAK.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.