Narrative:

During taxi to ramp after landing, ground control 121.4 was advised by me that we were in a rental aircraft unfamiliar with the airport and requested progressive taxi directions to ramp. Ground control guided us to taxiway M beside the ramp at which time maintenance personnel used hand signals from the ramp indicating we should taxi around to the southwest corner entrance. This entrance can be seen coming from runway 9R/taxiway left on the attached airport diagram. We advised ground control of our requirement to continue taxi from taxiway M out taxiway H, up taxiway left, wbound in order to enter ramp. Ground control asked if we could make the turn from taxiway H onto taxiway left which I advised yes we could. As we made the turn the right main gear came about 5 ft off the taxiway into the mud. Aircraft movement stopped and we shut down all engines to prevent FOD damage. The NOAA 'airport facility directory' does advise the txwys are 50 ft wide or less but nothing is stated that these txwys are unusable by large aircraft (over 12500 pounds). Also, being unfamiliar with the airport as we advised, ground control should have advised us of a better taxi route -- such as utilize runway 9R and not taxiway left. We were the 4TH large aircraft in recent months and the second large aircraft in 2 weeks to turn short on kfll txwys. Kfll airport (runway 9L and ramp area) has been upgraded to handle jet aircraft but all txwys have not been upgraded which creates confusion and problems. Small non-upgraded txwys should be notamed as non- usable for large aircraft and ground control/ATIS should advise flcs.

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Original NASA ASRS Text

Title: EXCURSION FROM TXWY.

Narrative: DURING TAXI TO RAMP AFTER LNDG, GND CTL 121.4 WAS ADVISED BY ME THAT WE WERE IN A RENTAL ACFT UNFAMILIAR WITH THE ARPT AND REQUESTED PROGRESSIVE TAXI DIRECTIONS TO RAMP. GND CTL GUIDED US TO TXWY M BESIDE THE RAMP AT WHICH TIME MAINT PERSONNEL USED HAND SIGNALS FROM THE RAMP INDICATING WE SHOULD TAXI AROUND TO THE SW CORNER ENTRANCE. THIS ENTRANCE CAN BE SEEN COMING FROM RWY 9R/TXWY L ON THE ATTACHED ARPT DIAGRAM. WE ADVISED GND CTL OF OUR REQUIREMENT TO CONTINUE TAXI FROM TXWY M OUT TXWY H, UP TXWY L, WBOUND IN ORDER TO ENTER RAMP. GND CTL ASKED IF WE COULD MAKE THE TURN FROM TXWY H ONTO TXWY L WHICH I ADVISED YES WE COULD. AS WE MADE THE TURN THE R MAIN GEAR CAME ABOUT 5 FT OFF THE TXWY INTO THE MUD. ACFT MOVEMENT STOPPED AND WE SHUT DOWN ALL ENGS TO PREVENT FOD DAMAGE. THE NOAA 'ARPT FACILITY DIRECTORY' DOES ADVISE THE TXWYS ARE 50 FT WIDE OR LESS BUT NOTHING IS STATED THAT THESE TXWYS ARE UNUSABLE BY LARGE ACFT (OVER 12500 LBS). ALSO, BEING UNFAMILIAR WITH THE ARPT AS WE ADVISED, GND CTL SHOULD HAVE ADVISED US OF A BETTER TAXI RTE -- SUCH AS UTILIZE RWY 9R AND NOT TXWY L. WE WERE THE 4TH LARGE ACFT IN RECENT MONTHS AND THE SECOND LARGE ACFT IN 2 WKS TO TURN SHORT ON KFLL TXWYS. KFLL ARPT (RWY 9L AND RAMP AREA) HAS BEEN UPGRADED TO HANDLE JET ACFT BUT ALL TXWYS HAVE NOT BEEN UPGRADED WHICH CREATES CONFUSION AND PROBS. SMALL NON-UPGRADED TXWYS SHOULD BE NOTAMED AS NON- USABLE FOR LARGE ACFT AND GND CTL/ATIS SHOULD ADVISE FLCS.

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.