Narrative:

While taxiing onto runway 30L, attempt to turn aircraft onto centerline became difficult with nosewheel steering. Aircraft seemed to be skidding on the ice. Aft center of gravity of 30.9% was perceived as reason for poor steering result. Differential thrust and braking was used to line up on centerline. Nosewheel was still not effective. Crew elected not to take off. Attempt to turn off on next taxiway proved difficult. With poor control and other commercial aircraft nearby, we elected to proceed down runway 30L and turn off on runway 22. Turn was accomplished with differential thrust and braking. After clear of runway 30L, flight engineer noticed that we had lost hydraulic quantity and pressure. Attempt was made to stop using brake accumulators with no results. Engine reversers were deployed yet no reverse thrust was obtained. Plane continued down the snow covered runway (with quartering tailwind at 350 degrees at 11 KTS). As aircraft drifted slowly off centerline to edge of runway (approximately 3-5 KTS), attempt was made to stow #1 and #2 reverser so engines #1 and #2 could be run up to stop drift off of runway. Reversers would not stow. Emergency air brake deployed but aircraft still continued to depart runway into adjacent field. No damage to aircraft or injury to crew members. Maintenance discovered broken hydraulic line to nosewheel steering.

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Original NASA ASRS Text

Title: DC8 FLT CREW HAS HYD FAILURE AND DEPARTS THE RWY WHILE TAXIING AT MSP.

Narrative: WHILE TAXIING ONTO RWY 30L, ATTEMPT TO TURN ACFT ONTO CTRLINE BECAME DIFFICULT WITH NOSEWHEEL STEERING. ACFT SEEMED TO BE SKIDDING ON THE ICE. AFT CTR OF GRAVITY OF 30.9% WAS PERCEIVED AS REASON FOR POOR STEERING RESULT. DIFFERENTIAL THRUST AND BRAKING WAS USED TO LINE UP ON CTRLINE. NOSEWHEEL WAS STILL NOT EFFECTIVE. CREW ELECTED NOT TO TAKE OFF. ATTEMPT TO TURN OFF ON NEXT TXWY PROVED DIFFICULT. WITH POOR CTL AND OTHER COMMERCIAL ACFT NEARBY, WE ELECTED TO PROCEED DOWN RWY 30L AND TURN OFF ON RWY 22. TURN WAS ACCOMPLISHED WITH DIFFERENTIAL THRUST AND BRAKING. AFTER CLR OF RWY 30L, FE NOTICED THAT WE HAD LOST HYD QUANTITY AND PRESSURE. ATTEMPT WAS MADE TO STOP USING BRAKE ACCUMULATORS WITH NO RESULTS. ENG REVERSERS WERE DEPLOYED YET NO REVERSE THRUST WAS OBTAINED. PLANE CONTINUED DOWN THE SNOW COVERED RWY (WITH QUARTERING TAILWIND AT 350 DEGS AT 11 KTS). AS ACFT DRIFTED SLOWLY OFF CTRLINE TO EDGE OF RWY (APPROX 3-5 KTS), ATTEMPT WAS MADE TO STOW #1 AND #2 REVERSER SO ENGS #1 AND #2 COULD BE RUN UP TO STOP DRIFT OFF OF RWY. REVERSERS WOULD NOT STOW. EMER AIR BRAKE DEPLOYED BUT ACFT STILL CONTINUED TO DEPART RWY INTO ADJACENT FIELD. NO DAMAGE TO ACFT OR INJURY TO CREW MEMBERS. MAINT DISCOVERED BROKEN HYD LINE TO NOSEWHEEL STEERING.

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.