Narrative:

The following is a list of the sequence of events during landing experimental exhibition warbird. Upon reaching abeam the numbers for landing put gear down made a landing radio call. While turning base to final put flaps down and made another radio call. On final made gumps check and moved landing gear safety latch into locked position. On touchdown and rollout noticed right wing going down abnormally; similar to a strong crosswind gust. Executed cross control maneuver with no effect as right wing continued to drop. At this point the aircraft crossed the runway to the right side into the grass between the runway and taxiway. Once entering the grass which was very wet the aircraft came to a stop after sliding another 1/2 turn to the right. Magnetos off and executed emergency exit procedure. Callback conversation with reporter revealed the following information: the reporter clarified that the right main landing gear did collapse during the landing rollout; and by the time it was discovered nothing could be done.

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Original NASA ASRS Text

Title: MILITARY WAR BIRD PILOT REPORTS GOING OFF RWY DURING LANDING ROLL OUT AS RIGHT MLG COLLAPSES.

Narrative: THE FOLLOWING IS A LIST OF THE SEQUENCE OF EVENTS DURING LNDG EXPERIMENTAL EXHIBITION WARBIRD. UPON REACHING ABEAM THE NUMBERS FOR LNDG PUT GEAR DOWN MADE A LNDG RADIO CALL. WHILE TURNING BASE TO FINAL PUT FLAPS DOWN AND MADE ANOTHER RADIO CALL. ON FINAL MADE GUMPS CHK AND MOVED LNDG GEAR SAFETY LATCH INTO LOCKED POS. ON TOUCHDOWN AND ROLLOUT NOTICED R WING GOING DOWN ABNORMALLY; SIMILAR TO A STRONG XWIND GUST. EXECUTED CROSS CTL MANEUVER WITH NO EFFECT AS R WING CONTINUED TO DROP. AT THIS POINT THE ACFT CROSSED THE RWY TO THE R SIDE INTO THE GRASS BTWN THE RWY AND TXWY. ONCE ENTERING THE GRASS WHICH WAS VERY WET THE ACFT CAME TO A STOP AFTER SLIDING ANOTHER 1/2 TURN TO THE R. MAGNETOS OFF AND EXECUTED EMER EXIT PROC. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE REPORTER CLARIFIED THAT THE RIGHT MAIN LNDG GEAR DID COLLAPSE DURING THE LANDING ROLLOUT; AND BY THE TIME IT WAS DISCOVERED NOTHING COULD BE DONE.

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.