SMA GEAR COLLAPSED ON LNDG.

Narrative

AFTER LNDG MY BEACHCRAFT TWIN BONANZA; THE GEAR RETRACTED AND COLLAPSED ON THE RWY. WX WAS CLR WITH A R XWIND ON FINAL. THE GEAR WAS CHKED DOWN SEVERAL TIMES BY MYSELF AND THE R SEAT PAX. WE TOUCHED DOWN ABOUT 200 FT DOWN. WHILE THE R GEAR NEVER CAME OFF OF THE RWY; THE R WING WAS SLIGHTLY HIGHER THAN THE L FOR SUFFICIENT XWIND INPUTS. I REALIZED THE ACFT WAS SETTLING TO THE RWY SO I REACHED FOR THE GEAR SWITCH TO ENSURE IT WAS DOWN. THE SWITCH WAS DOWN WHEN WE STOPPED BUT I DO NOT KNOW IF IT WAS DOWN OR UP WHEN I GRABBED IT. DAMAGE TO THE ACFT WAS LIMITED. WHEN I LAST TALKED TO THE FAA EXAMINER; HE HAD CLASSIFIED THIS AS AN INCIDENT BECAUSE OF THE LIMITED DAMAGE. PERTINENT BACKGND ISSUES: I AM CURRENTLY AN ACTIVE DUTY MIL PLT WITH OVER 3000 HRS TOTAL TIME. I CURRENTLY HAVE LESS THAN 200 HRS CIVILIAN PIC TIME. THE WING LOW XWIND LNDG TECHNIQUE IS NOT A HABIT PATTERN YET AND REQUIRES SOME CONCENTRATION TO COUNTER THE HABIT PATTERNS ESTABLISHED BY 3000 HRS OF FLT IN ACFT THAT LAND IN A CRAB. EARLY IN MY CIVILIAN TRAINING; I PICKED UP THE HABIT OF BRINGING UP THE FLAPS ON ROLLOUT TO INCREASE THE WT ON THE WHEELS FOR BRAKING PURPOSES AND TO DECREASE THE AFFECTS OF A XWIND WHILE ON THE GND. I DECIDED ABOUT 3 MONTHS AGO THAT THAT WAS PROBABLY NOT THE BEST TECHNIQUE. THERE ARE 2 POSSIBLE SCENARIOS THAT CAUSED THE GEAR TO RETRACT. FIRST; SOME MALFUNCTION OR INTERMITTENT ELECTRICAL PROB CAUSED IT TO. SECOND; I PULLED THE GEAR SWITCH UP THINKING I WAS PULLING THE FLAPS UP. I DON'T REMEMBER PULLING THE LNDG SWITCH UP. WE HAVE CHKED THE GEAR SYS AND WHILE WE HAVE FOUND A SLIGHT LOOSE SPOT IN THE GEAR SWITCH; I CANNOT DEFEND THE CONCLUSION THAT THAT WAS SUFFICIENT ENOUGH TO CAUSE AN UP SIGNAL TO THE GEAR. BECAUSE I DON'T REMEMBER DOING IT; I CAN'T COME TO THE CONCLUSION THAT I PULLED THE GEAR UP. BECAUSE MY MECH AND I CAN'T FIND A PROB WITH THE GEAR SYS; I CAN'T CONCLUSIVELY PIN IT ON A MECHANICAL FAILURE EITHER.