R MAIN GEAR FELL OFF AFTER LNDG ACFT DAMAGED.

Narrative

ON MAR/XX/95 I WAS THE PIC OF A TRAINING FLT THAT WAS INVOLVED IN AN ACFT INCIDENT. MY STUDENT AND I WERE PRACTICING TKOFS AND LNDGS WHEN THE R MAIN GEAR FELL OFF THE AIRPLANE. WE HAD ALREADY MADE 1 NORMAL LNDG TO A FULL STOP. IT WAS ON THE SECOND LNDG THAT THE INCIDENT OCCURRED. THE WIND WAS APPROX 30 DEGS TO THE L AT 10 KTS. THE APCH WAS NORMAL AND THE LNDG WAS MADE ON THE L WHEEL FOLLOWED BY THE R; THEN THE NOSEWHEEL TOUCHED THE RWY. THE AIRPLANE BALLOONED SLIGHTLY; APPROX 2-3 FT ABOVE THE RWY; THEN THE WHEEL ASSEMBLY FELL OFF. AS THE AIRPLANE SETTLED BACK ON THE RWY I MOMENTARILY ADDED FULL PWR AND TURNED THE CTL WHEEL TO THE L IN ORDER TO KEEP THE WING FROM STRIKING THE RWY. WE TRAVELED APPROX 500 FT DOWN THE RWY CTRLINE ON THE 2 REMAINING WHEELS; THEN THE R WING LOWERED SLOWLY UNTIL IT RESTED ON THE UPPER PORTION OF THE WHEEL ASSEMBLY WHICH IS CONNECTED TO THE WING. WE SKIDDED APPROX 100 FT UNTIL STOPPING ON THE R SIDE OF THE RWY WITH HALF OF THE AIRPLANE ON THE RWY AND THE OTHER HALF OFF. THERE WAS NO SUBSTANTIAL DAMAGE TO THE AIRPLANE; NOR WAS THERE ANY PROPERTY DAMAGE; OTHER THAN THE AIRPLANE; AND NO ONE WAS HURT. 2 DAYS PRIOR TO THE INCIDENT THE R MAIN GEAR STRUT HAD BEEN SVCED AND SIGNED OFF FOR RETURN TO SVC. IT IS MY OPINION THAT THE WORK WAS NOT DONE PROPERLY; THEREBY CAUSING THE R MAIN GEAR ASSEMBLY TO FALL OFF THE AIRPLANE. AFTER INSPECTING THE GEAR ASSEMBLY; IT WAS DETERMINED BY THE ACFT OWNER; A CERTIFIED MECH AND MYSELF; THAT THE REASON THE INCIDENT OCCURRED WAS DUE TO 1 OF THE 3 BOLTS SECURING THE GEAR TO THE WING FELL OUT.