Narrative:

Flight was from azo to pit, XA45, oct/xa/99. On taxi out, we received a hydraulic main temperature high caution annunciator system message. We called company and started checklist. The problem cleared itself and maintenance cleared us to go over the radio. Immediately after takeoff with gear in transit, we received hydraulic main pressure low caution annunciator system message, hydraulic main pump fail caution annunciator system and normal brake pressure low caution annunciator system message. We asked departure to let us level off, give us vectors and let us try to correct problem. We ran the hydraulic main pump fail checklist and contacted company through azo operations. During this time we were talking to maintenance to determine where to go. According to our tables and due to lack of brakes and flaps with hydraulic failure, we determined tol was our best choice with 10000 ft runway and fire and emergency facilities on field. We asked for vectors to tol. Prior to this, by running checklists, we were able to get gear down and locked. They had been -- after takeoff, nose gear up and locked and 2 main gear in transit. By putting gear handle down we got 2 green in main gear, but nose gear stayed up and locked. We then pumped down the nose gear and successfully ended with 3 gear down and locked. On the way to tol we declared an emergency as a precaution due to the lack of flaps and brakes with hydraulic failure. We had all normal indications for the gear. We did a fly-by of the tower in tol as verification and then made a non eventful landing at tol. We off-loaded passenger on the runway as we were unable to taxi without brakes. Once on the ground we activated the standby system and found it to be working, but the main pump was inoperative, it had failed.

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Original NASA ASRS Text

Title: A DORNIER 200 ON TKOF CLB AT 500 FT EXPERIENCED LOSS OF MAIN HYD SYS CAUSED BY THE MAIN HYD SYS PUMP FAILURE.

Narrative: FLT WAS FROM AZO TO PIT, XA45, OCT/XA/99. ON TAXI OUT, WE RECEIVED A HYD MAIN TEMP HIGH CAUTION ANNUNCIATOR SYS MESSAGE. WE CALLED COMPANY AND STARTED CHKLIST. THE PROB CLRED ITSELF AND MAINT CLRED US TO GO OVER THE RADIO. IMMEDIATELY AFTER TKOF WITH GEAR IN TRANSIT, WE RECEIVED HYD MAIN PRESSURE LOW CAUTION ANNUNCIATOR SYS MESSAGE, HYD MAIN PUMP FAIL CAUTION ANNUNCIATOR SYS AND NORMAL BRAKE PRESSURE LOW CAUTION ANNUNCIATOR SYS MESSAGE. WE ASKED DEP TO LET US LEVEL OFF, GIVE US VECTORS AND LET US TRY TO CORRECT PROB. WE RAN THE HYD MAIN PUMP FAIL CHKLIST AND CONTACTED COMPANY THROUGH AZO OPS. DURING THIS TIME WE WERE TALKING TO MAINT TO DETERMINE WHERE TO GO. ACCORDING TO OUR TABLES AND DUE TO LACK OF BRAKES AND FLAPS WITH HYD FAILURE, WE DETERMINED TOL WAS OUR BEST CHOICE WITH 10000 FT RWY AND FIRE AND EMER FACILITIES ON FIELD. WE ASKED FOR VECTORS TO TOL. PRIOR TO THIS, BY RUNNING CHKLISTS, WE WERE ABLE TO GET GEAR DOWN AND LOCKED. THEY HAD BEEN -- AFTER TKOF, NOSE GEAR UP AND LOCKED AND 2 MAIN GEAR IN TRANSIT. BY PUTTING GEAR HANDLE DOWN WE GOT 2 GREEN IN MAIN GEAR, BUT NOSE GEAR STAYED UP AND LOCKED. WE THEN PUMPED DOWN THE NOSE GEAR AND SUCCESSFULLY ENDED WITH 3 GEAR DOWN AND LOCKED. ON THE WAY TO TOL WE DECLARED AN EMER AS A PRECAUTION DUE TO THE LACK OF FLAPS AND BRAKES WITH HYD FAILURE. WE HAD ALL NORMAL INDICATIONS FOR THE GEAR. WE DID A FLY-BY OF THE TWR IN TOL AS VERIFICATION AND THEN MADE A NON EVENTFUL LNDG AT TOL. WE OFF-LOADED PAX ON THE RWY AS WE WERE UNABLE TO TAXI WITHOUT BRAKES. ONCE ON THE GND WE ACTIVATED THE STANDBY SYS AND FOUND IT TO BE WORKING, BUT THE MAIN PUMP WAS INOP, IT HAD FAILED.

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.