AN MD80S LANDS AND ATTEMPTS TO MAKE A 180 DEG TURN ON THE RWY AT RIC AND THE R MAIN GEAR SINKS INTO THE ASPHALT. ACFT HAS TO BE TOWED OUT OF RWY SINK HOLE AND TOWED TO THE GATE.

Narrative

ON JUN/XX/98 FLT YYY LANDED AT RIC ON RWY 16 AT XA54. RWY 16 WAS THE NORMAL LNDG RWY. RWY 20 WAS AVAILABLE FOR USE; BUT IS ONLY 6607 FT LONG. THE ACFT WEIGHED 122000 LBS AND WE PLANNED A 40 DEG FLAP APCH. THE APCH AND TOUCHDOWN WERE NORMAL AND WE ROLLED OUT ON THE RWY UNTIL APPROX 1200 FT REMAINING. THE NORMAL TAXI RTE TO RETURN TO THE TERMINAL WAS A R TURN OFF ONTO TXWY L; BUT IT WAS CLOSED FOR CONSTRUCTION. TXWY M IS PROHIBITED FROM USE BY MD80 ACFT. THE ONLY WAY TO TAXI BACK TO THE TERMINAL FROM OUR POS WAS TO EXECUTE A 180 DEG TURN ON THE RWY AND BACK TAXI ON THE RWY. THIS MANEUVER WAS ANTICIPATED AND THE CREW BRIEFED AND DISCUSSED THE MANEUVER DURING THE RWY 16 APCH BRIEFING. TWR GRANTED CLRNC FOR THIS MANEUVER DURING THE ROLLOUT. THE CAPT MANEUVERED THE ACFT FROM THE RWY CTRLINE AND SLOWLY STARTED TO ANGLE TOWARDS THE R SIDE OF THE RWY TO PREPARE FOR A L 180 DEG TURN. THE ATTN OF BOTH CREW MEMBERS WAS ON CONDUCTING THIS MANEUVER AND NO ACFT CHKLIST ITEMS WERE BEING PERFORMED. RWY 16 IS 9003 FT LONG AND 150 FT WIDE. THE MINIMUM DISTANCE REQUIRED FOR A 180 DEG TURN IS 94 FT 4 INCHES. A WHITE STRIPE IS PAINTED ALONG THE EDGE OF THE RWY TO DEFINE THE RWY FROM THE ASPHALT SHOULDER. THE ASPHALT SHOULDER EXTENDS ANOTHER APPROX 20-25 FT BEYOND THE WHITE RWY EDGE STRIPE. THE TEXTURE AND COLOR OF THE ASPHALT SHOULDER APPEAR FROM THE COCKPIT TO BE IDENTICAL TO THE MATERIAL OF THE RWY ITSELF. THE TURN WAS INITIATED TO THE L AND AFTER APPROX 15 DEGS OF TURN THE ACFT SLOWED FROM A NORMAL TAXI SPD AND STOPPED ALL MOVEMENT. AFTER DETERMINING THAT BRAKE TEMPS WERE WELL BELOW NORMAL WE SLOWLY APPLIED A SMALL AMOUNT OF PWR; BUT THIS DID NOT MOVE THE ACFT. TWR WAS NOTIFIED AND A FIRE/RESCUE TRUCK CONFIRMED THAT OUR R MAIN WHEEL ASSEMBLY HAD BROKEN THROUGH THE ASPHALT SHOULDER AND WAS APPROX 3-6 INCHES BELOW THE SURFACE OF THE ASPHALT. WE ACCOMPLISHED THE ENG SHUTDOWN CHKLIST AND NOTIFIED ACR RICHMOND STATION PERSONNEL THAT WE REQUIRED ASSISTANCE. AT XB45 THE STATION MGR OPENED THE FRONT CABIN DOOR. PAX WERE DEPLANED USING MOBILE STAIRS AND DRIVEN TO THE TERMINAL ON BUSSES. THE FIRST OF 3 LOADS OF PAX DEPARTED THE ACFT SCENE AT XB55 AND THE LAST PAX DEPARTED AT XC55. THE CAPT KEPT THE PAX FULLY INFORMED AS TO THE PROGRESS OF THE SIT AND THERE WERE NO INJURIES DURING THE TAXI MANEUVER OR DURING THE DEPLANING. UPON INSPECTION OF THE ACFT IT APPEARED AS THOUGH THE NOSEWHEEL HAD CROSSED OVER THE WHITE RWY EDGE LINE JUST PRIOR TO INITIATING THE L TURN. THE L EDGE OF THE L NOSE TIRE HAD RUN JUST OUTSIDE AND PARALLEL TO THE WHITE RWY EDGE LINE. THE NOSE TIRE DID NOT BREAK THROUGH THE ASPHALT SHOULDER AT ANY POINT. THE R MAIN TIRE HAD ALSO CROSSED OVER THE WHITE RWY EDGE LINE AND ONTO THE ASPHALT SHOULDER. THE OUTSIDE EDGE OF THE #4 TIRE WAS APPROX 4-5 FT BEYOND THE WHITE RWY EDGE LINE AT ITS FURTHEST POINT. DURING ITS TRAVEL; IT BROKE THROUGH THE ASPHALT SHOULDER IMMEDIATELY AFTER XING THE WHITE LINE; BUT THEN RODE ON TOP OF THE ASPHALT AS IT PARALLELED THE WHITE LINE. AS THE L TURN WAS CONTINUED; THE MAIN TIRES BROKE THROUGH THE ASPHALT AGAIN AS THE WHEEL ASSEMBLY APCHED THE WHITE LINE. THE WHEEL ASSEMBLY THEN BECAME STUCK IN THE ASPHALT SHOULDER JUST PRIOR TO XING THE WHITE LINE. THE ACFT WAS APPROX 1200 FT FROM THE END OF THE RWY ON THE R SIDE AND HAD TURNED TO THE L APPROX 15 DEGS. THERE DID NOT APPEAR TO BE ANY VISIBLE DAMAGE TO EITHER THE NOSEWHEELS OR THE R MAIN GEAR ASSEMBLY.