Narrative:

I reported left downwind and was then cleared to land runway 17 by ZZZ tower. I performed my pre-landing checklist (gumps) and confirmed a green light on the landing gear indicator light. I completed my approach and landed uneventfully. As I was rolling out on runway 17; I noticed my right wingtip began to drop. I quickly confirmed the gear handle was down and secure. I then raised the flaps; pulled the mixture and rode the plane as it turned 90 degrees to the right and came to rest on the grass west of runway 17; about 200 ft north of intersection A4. I responded to a radio call from tower; confirming that both myself and passenger were ok and uninjured. I then turned the master off and we exited the plane from the main cabin door. The plane was resting on its right wing; the right main gear was partially retracted; the left main and nose gear were extended and locked. There was not a propeller strike and the damage appeared to be minimal. I called tower and then the local FSDO to report this incident. An inspector from the local FSDO arrived and declared this an incident. In our opinion; it appeared as if there was a mechanical malfunction with the right landing gear during rollout. The aircraft was lifted back onto its gear; the right main was secured with a safety bar; and the aircraft was towed to a maintenance hangar on the field.

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Original NASA ASRS Text

Title: BE35 PLT SUFFERS PARTIAL COLLAPSE OF RIGHT MAIN GEAR DURING LNDG ROLL.

Narrative: I RPTED L DOWNWIND AND WAS THEN CLRED TO LAND RWY 17 BY ZZZ TWR. I PERFORMED MY PRE-LNDG CHKLIST (GUMPS) AND CONFIRMED A GREEN LIGHT ON THE LNDG GEAR INDICATOR LIGHT. I COMPLETED MY APCH AND LANDED UNEVENTFULLY. AS I WAS ROLLING OUT ON RWY 17; I NOTICED MY R WINGTIP BEGAN TO DROP. I QUICKLY CONFIRMED THE GEAR HANDLE WAS DOWN AND SECURE. I THEN RAISED THE FLAPS; PULLED THE MIXTURE AND RODE THE PLANE AS IT TURNED 90 DEGS TO THE R AND CAME TO REST ON THE GRASS W OF RWY 17; ABOUT 200 FT N OF INTXN A4. I RESPONDED TO A RADIO CALL FROM TWR; CONFIRMING THAT BOTH MYSELF AND PAX WERE OK AND UNINJURED. I THEN TURNED THE MASTER OFF AND WE EXITED THE PLANE FROM THE MAIN CABIN DOOR. THE PLANE WAS RESTING ON ITS R WING; THE R MAIN GEAR WAS PARTIALLY RETRACTED; THE L MAIN AND NOSE GEAR WERE EXTENDED AND LOCKED. THERE WAS NOT A PROP STRIKE AND THE DAMAGE APPEARED TO BE MINIMAL. I CALLED TWR AND THEN THE LCL FSDO TO RPT THIS INCIDENT. AN INSPECTOR FROM THE LCL FSDO ARRIVED AND DECLARED THIS AN INCIDENT. IN OUR OPINION; IT APPEARED AS IF THERE WAS A MECHANICAL MALFUNCTION WITH THE R LNDG GEAR DURING ROLLOUT. THE ACFT WAS LIFTED BACK ONTO ITS GEAR; THE R MAIN WAS SECURED WITH A SAFETY BAR; AND THE ACFT WAS TOWED TO A MAINT HANGAR ON THE FIELD.

Data retrieved from NASA's ASRS site as of May 2009 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.