GA aircraft has left main gear malfunction during landing.

Attributes
ACN	564220
Time
Date	200210
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : otm.airport
State Reference	IA
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 22.9 flight time total : 1050 flight time type : 1.30
ASRS Report	564220
Person 2
Affiliation	other
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : gear indicator other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

I was on an IFR flight plan to otm. On approach into otm, I lowered the landing gear and did not get a green light for the left main gear. I did the emergency gear extension procedures, including recycling the gear, and yawing aircraft side-to-side, after which I still could not get a green light for left main. Having done everything I could do to get the green light, I proceeded to land. The landing was fine, however, about 2/3 of the way through the rollout, the left main collapsed and the aircraft skidded on the left flap wingtip. I maintained sufficient control to keep aircraft from going off runway side. Several folks, including an aircraft mechanic came out and we got the plane jacked up and the left gear extended. It was very difficult for the mechanic to get the left gear locked and he said that this mechanical problem was what prevented me from getting it locked in the air. He also said this mechanical gear problem was not caused by the collapse and sliding, but was present beforehand. The plane was easily towed to a hangar.

Original NASA ASRS Text

Title: GA ACFT HAS L MAIN GEAR MALFUNCTION DURING LNDG.

Narrative: I WAS ON AN IFR FLT PLAN TO OTM. ON APCH INTO OTM, I LOWERED THE LNDG GEAR AND DID NOT GET A GREEN LIGHT FOR THE L MAIN GEAR. I DID THE EMER GEAR EXTENSION PROCS, INCLUDING RECYCLING THE GEAR, AND YAWING ACFT SIDE-TO-SIDE, AFTER WHICH I STILL COULD NOT GET A GREEN LIGHT FOR L MAIN. HAVING DONE EVERYTHING I COULD DO TO GET THE GREEN LIGHT, I PROCEEDED TO LAND. THE LNDG WAS FINE, HOWEVER, ABOUT 2/3 OF THE WAY THROUGH THE ROLLOUT, THE L MAIN COLLAPSED AND THE ACFT SKIDDED ON THE L FLAP WINGTIP. I MAINTAINED SUFFICIENT CTL TO KEEP ACFT FROM GOING OFF RWY SIDE. SEVERAL FOLKS, INCLUDING AN ACFT MECH CAME OUT AND WE GOT THE PLANE JACKED UP AND THE L GEAR EXTENDED. IT WAS VERY DIFFICULT FOR THE MECH TO GET THE L GEAR LOCKED AND HE SAID THAT THIS MECHANICAL PROB WAS WHAT PREVENTED ME FROM GETTING IT LOCKED IN THE AIR. HE ALSO SAID THIS MECHANICAL GEAR PROB WAS NOT CAUSED BY THE COLLAPSE AND SLIDING, BUT WAS PRESENT BEFOREHAND. THE PLANE WAS EASILY TOWED TO A HANGAR.

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.