Narrative:

A normal approach was established and maintained to the centerline of runway 30 (westerly direction), AWOS was monitored before and throughout the flight and no discernable crosswind was noted. Thus, I landed in a full stall, three point attitude on centerline of runway 30. During rollout, the airplane suddenly shifted on the landing gear and started to pull hard to the right. The sensation was like that of a right side flat tire. I immediately applied left rudder (to full stop deflection), but this had no corrective effect. The airplane continued to swerve hard to the right side of the runway at an estimated speed of approximately 20-25 mph. The plane felt as if it had shifted toward the left gear and simultaneously the tail broke loose and the left gear collapsed inward. The airplane immediately came to rest facing in an easterly direction and approximately parallel to the landing runway 30. It appears that failure of the left main gear strut caused this incident. A local a&P was on site and inspected the part, noting a pre-existing crack in the strut. In his opinion, the strut failed on landing and caused the incident. Accordingly, at this time, I have reached no conclusion as to any action/reaction which I might have taken to prevent or mitigate this incident. Callback conversation with reporter revealed the following information: the reporter stated the landing was normal and on rollout the airplane pulled hard to the right. The left main gear finally collapsed bending inward and detaching itself from the fuselage mounting. The landing gear was inspected and a crack was discovered where the strut failed just below the axle bolt. The airplane incurred damage to the propeller and the engine may have to be torn down for inspection.

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Original NASA ASRS Text

Title: AN MX-7-180 ON LNDG ROLLOUT HAD THE L LNDG GEAR COLLAPSE INCURRING PROPELLER DAMAGE AND POSSIBLE ENG TEARDOWN.

Narrative: A NORMAL APCH WAS ESTABLISHED AND MAINTAINED TO THE CTRLINE OF RWY 30 (WESTERLY DIRECTION), AWOS WAS MONITORED BEFORE AND THROUGHOUT THE FLT AND NO DISCERNABLE XWIND WAS NOTED. THUS, I LANDED IN A FULL STALL, THREE POINT ATTITUDE ON CTRLINE OF RWY 30. DURING ROLLOUT, THE AIRPLANE SUDDENLY SHIFTED ON THE LNDG GEAR AND STARTED TO PULL HARD TO THE R. THE SENSATION WAS LIKE THAT OF A R SIDE FLAT TIRE. I IMMEDIATELY APPLIED L RUDDER (TO FULL STOP DEFLECTION), BUT THIS HAD NO CORRECTIVE EFFECT. THE AIRPLANE CONTINUED TO SWERVE HARD TO THE R SIDE OF THE RWY AT AN ESTIMATED SPEED OF APPROX 20-25 MPH. THE PLANE FELT AS IF IT HAD SHIFTED TOWARD THE L GEAR AND SIMULTANEOUSLY THE TAIL BROKE LOOSE AND THE L GEAR COLLAPSED INWARD. THE AIRPLANE IMMEDIATELY CAME TO REST FACING IN AN EASTERLY DIRECTION AND APPROX PARALLEL TO THE LNDG RWY 30. IT APPEARS THAT FAILURE OF THE L MAIN GEAR STRUT CAUSED THIS INCIDENT. A LOCAL A&P WAS ON SITE AND INSPECTED THE PART, NOTING A PRE-EXISTING CRACK IN THE STRUT. IN HIS OPINION, THE STRUT FAILED ON LNDG AND CAUSED THE INCIDENT. ACCORDINGLY, AT THIS TIME, I HAVE REACHED NO CONCLUSION AS TO ANY ACTION/REACTION WHICH I MIGHT HAVE TAKEN TO PREVENT OR MITIGATE THIS INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE LNDG WAS NORMAL AND ON ROLLOUT THE AIRPLANE PULLED HARD TO THE R. THE L MAIN GEAR FINALLY COLLAPSED BENDING INWARD AND DETACHING ITSELF FROM THE FUSELAGE MOUNTING. THE LNDG GEAR WAS INSPECTED AND A CRACK WAS DISCOVERED WHERE THE STRUT FAILED JUST BELOW THE AXLE BOLT. THE AIRPLANE INCURRED DAMAGE TO THE PROPELLER AND THE ENG MAY HAVE TO BE TORN DOWN FOR INSPECTION.

Data retrieved from NASA's ASRS site as of July 2007 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.