Private pilot of an small aircraft sel experienced the landing gear collapse during landing rollout.

Attributes
ACN	301493
Time
Date	199504
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : anb
State Reference	AL
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 J (201)
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 60 flight time total : 11000 flight time type : 40
ASRS Report	301493
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	faa : investigated Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On rollout, the gear collapsed. The airplane slid to the left, hit the #3 marker, turned 90 degrees and cleared the runway. A propjet and single engine airplane landed after this mishap. Suggest gear box malfunction or pilot. Callback conversation with reporter revealed the following information: reporter stated that he still did not know what caused the gear to collapse, it was a mechanical malfunction or himself in erring to properly assure the gear down and locked! He said that he had started flying many yrs ago and used an aircraft in his work as a sales representative. He stated that he did put the gear down before landing and that a touch and go was not planned or started. He just does not know what went wrong.

Original NASA ASRS Text

Title: PVT PLT OF AN SMA SEL EXPERIENCED THE LNDG GEAR COLLAPSE DURING LNDG ROLLOUT.

Narrative: ON ROLLOUT, THE GEAR COLLAPSED. THE AIRPLANE SLID TO THE L, HIT THE #3 MARKER, TURNED 90 DEGS AND CLRED THE RWY. A PROPJET AND SINGLE ENG AIRPLANE LANDED AFTER THIS MISHAP. SUGGEST GEAR BOX MALFUNCTION OR PLT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE STILL DID NOT KNOW WHAT CAUSED THE GEAR TO COLLAPSE, IT WAS A MECHANICAL MALFUNCTION OR HIMSELF IN ERRING TO PROPERLY ASSURE THE GEAR DOWN AND LOCKED! HE SAID THAT HE HAD STARTED FLYING MANY YRS AGO AND USED AN ACFT IN HIS WORK AS A SALES REPRESENTATIVE. HE STATED THAT HE DID PUT THE GEAR DOWN BEFORE LNDG AND THAT A TOUCH AND GO WAS NOT PLANNED OR STARTED. HE JUST DOES NOT KNOW WHAT WENT WRONG.

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.