Narrative:

I was advised by the so that the left main gear brakes were warm. I deplaned and inspected both gears. The right gear was almost cool, however, the left main was warm. I was able to lay my hands on the insides of both tires up against the rim without discomfort. This indicated that the brakes/tires were not 'hot,' simply warm. I mentioned to the mechanic on board that the left main gear was warm and he said he would have it checked. I heard nothing more about it. Takeoff on runway 35R at close to maximum gross takeoff weight was uneventful to 125 KTS when a vibration was felt. Takeoff was continued, aircraft rotated at approximately 140 KTS. Aircraft became airborne and I asked the first officer to ask the tower if they had observed anything unusual. The tower advised in the negative. The gear was raised uneventfully at about 800 ft AGL. 'B' system hydraulic low pressure lights illuminated on both the forward panel and the so panel. We were on departure control at this time. I told the first officer and so of my intentions to return and land. I asked the first officer to call departure control for a dump heading. The first officer declared an emergency, relayed our desire to return and asked for a dump heading. Departure said we were cleared to dump to 10000 pounds. I made a PA advising the passenger of our situation. I told the fsm she had 15 mins to prepare for landing and that we were not anticipating an emergency evacuate/evacuation. We requested a fly-by to let the tower view the main gear. We were advised that our #2 tire was shredded, our #1 tire, intact. We could see that the emergency equipment was in place, and were cleared for a visual approach. Landing was uneventful. Using moderate reverse thrust, aircraft reached taxi speed with approximately 2000 ft remaining and was brought to a halt in the last 1000 ft. When the throttles were returned to forward thrust, the aircraft began to roll forward and the pneumatic brake system was used to park the aircraft on the runway. The fire trucks were at the aircraft. There was no fire. The company advised us that we would be towed from the runway and the passenger bussed to the terminal, as another aircraft was being readied for the flight to lax. The aft air stairs were lowered at XC48. The passenger were deplaned without incident with 1 handicapped woman carried from the aircraft by 2 firemen. The crew returned to the terminal with the passenger. Flight attendants were replaced for the continuation and the flight crew prepared for departure. In the meantime, I contacted den chief pilot and discussed the incident with him. A captain's irregularity report was filed and the flight continued to lax.

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Original NASA ASRS Text

Title: AN ACR LGT DUMPED FUEL TO RETURN LAND WITH A HYD PROB.

Narrative: I WAS ADVISED BY THE SO THAT THE L MAIN GEAR BRAKES WERE WARM. I DEPLANED AND INSPECTED BOTH GEARS. THE R GEAR WAS ALMOST COOL, HOWEVER, THE L MAIN WAS WARM. I WAS ABLE TO LAY MY HANDS ON THE INSIDES OF BOTH TIRES UP AGAINST THE RIM WITHOUT DISCOMFORT. THIS INDICATED THAT THE BRAKES/TIRES WERE NOT 'HOT,' SIMPLY WARM. I MENTIONED TO THE MECH ON BOARD THAT THE L MAIN GEAR WAS WARM AND HE SAID HE WOULD HAVE IT CHKED. I HEARD NOTHING MORE ABOUT IT. TKOF ON RWY 35R AT CLOSE TO MAX GROSS TKOF WT WAS UNEVENTFUL TO 125 KTS WHEN A VIBRATION WAS FELT. TKOF WAS CONTINUED, ACFT ROTATED AT APPROX 140 KTS. ACFT BECAME AIRBORNE AND I ASKED THE FO TO ASK THE TWR IF THEY HAD OBSERVED ANYTHING UNUSUAL. THE TWR ADVISED IN THE NEGATIVE. THE GEAR WAS RAISED UNEVENTFULLY AT ABOUT 800 FT AGL. 'B' SYS HYD LOW PRESSURE LIGHTS ILLUMINATED ON BOTH THE FORWARD PANEL AND THE SO PANEL. WE WERE ON DEP CTL AT THIS TIME. I TOLD THE FO AND SO OF MY INTENTIONS TO RETURN AND LAND. I ASKED THE FO TO CALL DEP CTL FOR A DUMP HDG. THE FO DECLARED AN EMER, RELAYED OUR DESIRE TO RETURN AND ASKED FOR A DUMP HDG. DEP SAID WE WERE CLRED TO DUMP TO 10000 LBS. I MADE A PA ADVISING THE PAX OF OUR SIT. I TOLD THE FSM SHE HAD 15 MINS TO PREPARE FOR LNDG AND THAT WE WERE NOT ANTICIPATING AN EMER EVAC. WE REQUESTED A FLY-BY TO LET THE TWR VIEW THE MAIN GEAR. WE WERE ADVISED THAT OUR #2 TIRE WAS SHREDDED, OUR #1 TIRE, INTACT. WE COULD SEE THAT THE EMER EQUIP WAS IN PLACE, AND WERE CLRED FOR A VISUAL APCH. LNDG WAS UNEVENTFUL. USING MODERATE REVERSE THRUST, ACFT REACHED TAXI SPD WITH APPROX 2000 FT REMAINING AND WAS BROUGHT TO A HALT IN THE LAST 1000 FT. WHEN THE THROTTLES WERE RETURNED TO FORWARD THRUST, THE ACFT BEGAN TO ROLL FORWARD AND THE PNEUMATIC BRAKE SYS WAS USED TO PARK THE ACFT ON THE RWY. THE FIRE TRUCKS WERE AT THE ACFT. THERE WAS NO FIRE. THE COMPANY ADVISED US THAT WE WOULD BE TOWED FROM THE RWY AND THE PAX BUSSED TO THE TERMINAL, AS ANOTHER ACFT WAS BEING READIED FOR THE FLT TO LAX. THE AFT AIR STAIRS WERE LOWERED AT XC48. THE PAX WERE DEPLANED WITHOUT INCIDENT WITH 1 HANDICAPPED WOMAN CARRIED FROM THE ACFT BY 2 FIREMEN. THE CREW RETURNED TO THE TERMINAL WITH THE PAX. FLT ATTENDANTS WERE REPLACED FOR THE CONTINUATION AND THE FLC PREPARED FOR DEP. IN THE MEANTIME, I CONTACTED DEN CHIEF PLT AND DISCUSSED THE INCIDENT WITH HIM. A CAPT'S IRREGULARITY RPT WAS FILED AND THE FLT CONTINUED TO LAX.

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.