Small aircraft has landing gear collapse on landing.

Attributes
ACN	322006
Time
Date	199511
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ffl
State Reference	IA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi
Experience	flight time last 90 days : 96 flight time total : 975 flight time type : 150
ASRS Report	322006
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:

On an extended downwind to ffl, I extended one notch of flaps as the aircraft speed decelerated to flap range. Immediately following, I moved the gear selector switch to the down position and heard the gear cycle normally followed by illumination of the green gear down light (aircraft has only 1 gear down light). The approach proceeded normally to base and final with full flaps extended and a normal approach speed of 80 mph. It is important to note that the gear down light was checked an additional 2 times during the approach and was found illuminated throughout the approach. Continuing to the roundout and flare there was a crosswind from the right so a sideslip with right wing down was flown into the flare. The right main gear touched down first followed by the stall warning horn. The left wing settled and events proceeded quickly. The left main gear and nose gear were not down and locked and right main gear folded back up as the aircraft slid straight down the runway on its belly for 200-250 ft. All on board exited safely after the aircraft stopped. In short, there was never any indication that the gear was not down and locked. The landing gear/warning system simply malfunctioned catastrophically.

Original NASA ASRS Text

Title: SMA HAS LNDG GEAR COLLAPSE ON LNDG.

Narrative: ON AN EXTENDED DOWNWIND TO FFL, I EXTENDED ONE NOTCH OF FLAPS AS THE ACFT SPD DECELERATED TO FLAP RANGE. IMMEDIATELY FOLLOWING, I MOVED THE GEAR SELECTOR SWITCH TO THE DOWN POS AND HEARD THE GEAR CYCLE NORMALLY FOLLOWED BY ILLUMINATION OF THE GREEN GEAR DOWN LIGHT (ACFT HAS ONLY 1 GEAR DOWN LIGHT). THE APCH PROCEEDED NORMALLY TO BASE AND FINAL WITH FULL FLAPS EXTENDED AND A NORMAL APCH SPD OF 80 MPH. IT IS IMPORTANT TO NOTE THAT THE GEAR DOWN LIGHT WAS CHKED AN ADDITIONAL 2 TIMES DURING THE APCH AND WAS FOUND ILLUMINATED THROUGHOUT THE APCH. CONTINUING TO THE ROUNDOUT AND FLARE THERE WAS A XWIND FROM THE R SO A SIDESLIP WITH R WING DOWN WAS FLOWN INTO THE FLARE. THE R MAIN GEAR TOUCHED DOWN FIRST FOLLOWED BY THE STALL WARNING HORN. THE L WING SETTLED AND EVENTS PROCEEDED QUICKLY. THE L MAIN GEAR AND NOSE GEAR WERE NOT DOWN AND LOCKED AND R MAIN GEAR FOLDED BACK UP AS THE ACFT SLID STRAIGHT DOWN THE RWY ON ITS BELLY FOR 200-250 FT. ALL ON BOARD EXITED SAFELY AFTER THE ACFT STOPPED. IN SHORT, THERE WAS NEVER ANY INDICATION THAT THE GEAR WAS NOT DOWN AND LOCKED. THE LNDG GEAR/WARNING SYS SIMPLY MALFUNCTIONED CATASTROPHICALLY.

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.