Narrative:

First officer made normal approach and landing. We prebriefed him to make turnoff of active onto taxiway M then onto taxiway east. As aircraft was nebound on taxiway east, as I was assuming control of the tiller, aircraft was drifting right of taxiway centerline. I assumed control and inputted a l-hand steering command. Aircraft was unusually sluggish to respond, so I inputted a further l-hand command at which time the aircraft suddenly swerved to left and drifted across the centerline of taxiway east, and began heading to the left edge of the taxiway. I immediately added additional 4-HAND steering input from what I had inputted to correct back to centerline but, again, aircraft was slow to respond and drifted off the edge of the taxiway with the l-hand wing gear and nose gear coming to rest in soft earth. All braking and steering inputs to keep aircraft on taxiway seemed to have little or no effect. When I realized aircraft was mired in the soft earth with no fire or other emergencys apparent, I ordered the first officer to call the cabin and tell everyone to remain seated, which he did. No evacuate/evacuation took place. We coordinated with ground control to get crash fire rescue equipment to the scene which was accomplished in a timely manner. Passenger and crew were then deplaned through door 1R via mobile stairs and bussed to the terminal. Cockpit was secured using normal shutdown/parking checklists and company was notified. Aircraft was prevented from sliding over a large embankment to the right of taxiway east.

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Original NASA ASRS Text

Title: A B747 FLT CREW WHILE TAXIING, LOSES ACFT CTL AND ENDS UP STUCK IN THE MUD ON THE SIDE OF THE TXWY.

Narrative: FO MADE NORMAL APCH AND LNDG. WE PREBRIEFED HIM TO MAKE TURNOFF OF ACTIVE ONTO TXWY M THEN ONTO TXWY E. AS ACFT WAS NEBOUND ON TXWY E, AS I WAS ASSUMING CTL OF THE TILLER, ACFT WAS DRIFTING R OF TXWY CTRLINE. I ASSUMED CTL AND INPUTTED A L-HAND STEERING COMMAND. ACFT WAS UNUSUALLY SLUGGISH TO RESPOND, SO I INPUTTED A FURTHER L-HAND COMMAND AT WHICH TIME THE ACFT SUDDENLY SWERVED TO L AND DRIFTED ACROSS THE CTRLINE OF TXWY E, AND BEGAN HEADING TO THE L EDGE OF THE TXWY. I IMMEDIATELY ADDED ADDITIONAL 4-HAND STEERING INPUT FROM WHAT I HAD INPUTTED TO CORRECT BACK TO CTRLINE BUT, AGAIN, ACFT WAS SLOW TO RESPOND AND DRIFTED OFF THE EDGE OF THE TXWY WITH THE L-HAND WING GEAR AND NOSE GEAR COMING TO REST IN SOFT EARTH. ALL BRAKING AND STEERING INPUTS TO KEEP ACFT ON TXWY SEEMED TO HAVE LITTLE OR NO EFFECT. WHEN I REALIZED ACFT WAS MIRED IN THE SOFT EARTH WITH NO FIRE OR OTHER EMERS APPARENT, I ORDERED THE FO TO CALL THE CABIN AND TELL EVERYONE TO REMAIN SEATED, WHICH HE DID. NO EVAC TOOK PLACE. WE COORDINATED WITH GND CTL TO GET CFR TO THE SCENE WHICH WAS ACCOMPLISHED IN A TIMELY MANNER. PAX AND CREW WERE THEN DEPLANED THROUGH DOOR 1R VIA MOBILE STAIRS AND BUSSED TO THE TERMINAL. COCKPIT WAS SECURED USING NORMAL SHUTDOWN/PARKING CHKLISTS AND COMPANY WAS NOTIFIED. ACFT WAS PREVENTED FROM SLIDING OVER A LARGE EMBANKMENT TO THE R OF TXWY E.

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.