The left main gear collapsed after touch down.

Attributes
ACN	278413
Time
Date	199407
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lvk
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	M-20 K (231)
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 12 flight time total : 1165 flight time type : 1000
ASRS Report	278413
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Made normal landing, plane traveled approximately 800 ft down runway and slowed to plus or minus 50 KTS. Started to brake for upcoming taxi exit. Left wing suddenly dropped to ground, aircraft spun plus or minus 30 degrees to left, propeller hit the ground. Aircraft slide for approximately 125 ft before coming to a stop. Executing pre-plan, pilot and passenger immediately exited plane. Problem appears to be mechanic failure in left gear. Annual on plane nov/xx/93: hours -- 729. Callback conversation with reporter revealed the following information: the aircraft is a mooney 231, built in 1985. The reporter states that the stop switch in the left gear failed allowing the retract/extend dc motor to break the left gear extension tube. The wing dropped causing damage to the left tip, pitot tube, left flap covers, belly pan, etc. The propeller struck the pavement damaging the propeller and requiring an engine teardown due to sudden stoppage. The failed left gear extension tube has been sent to the manufacturer for analysis. The results have not yet been received by the reporter. The reporter is not happy to have this much damage in a relatively new aircraft -- only 729 hours and about 450 cycles.

Original NASA ASRS Text

Title: THE L MAIN GEAR COLLAPSED AFTER TOUCH DOWN.

Narrative: MADE NORMAL LNDG, PLANE TRAVELED APPROX 800 FT DOWN RWY AND SLOWED TO PLUS OR MINUS 50 KTS. STARTED TO BRAKE FOR UPCOMING TAXI EXIT. L WING SUDDENLY DROPPED TO GND, ACFT SPUN PLUS OR MINUS 30 DEGS TO L, PROP HIT THE GND. ACFT SLIDE FOR APPROX 125 FT BEFORE COMING TO A STOP. EXECUTING PRE-PLAN, PLT AND PAX IMMEDIATELY EXITED PLANE. PROB APPEARS TO BE MECH FAILURE IN L GEAR. ANNUAL ON PLANE NOV/XX/93: HRS -- 729. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE ACFT IS A MOONEY 231, BUILT IN 1985. THE RPTR STATES THAT THE STOP SWITCH IN THE L GEAR FAILED ALLOWING THE RETRACT/EXTEND DC MOTOR TO BREAK THE L GEAR EXTENSION TUBE. THE WING DROPPED CAUSING DAMAGE TO THE L TIP, PITOT TUBE, L FLAP COVERS, BELLY PAN, ETC. THE PROP STRUCK THE PAVEMENT DAMAGING THE PROP AND REQUIRING AN ENG TEARDOWN DUE TO SUDDEN STOPPAGE. THE FAILED L GEAR EXTENSION TUBE HAS BEEN SENT TO THE MANUFACTURER FOR ANALYSIS. THE RESULTS HAVE NOT YET BEEN RECEIVED BY THE RPTR. THE RPTR IS NOT HAPPY TO HAVE THIS MUCH DAMAGE IN A RELATIVELY NEW ACFT -- ONLY 729 HRS AND ABOUT 450 CYCLES.

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.