Aircraft equipment problem as small aircraft twin's gear collapses on landing.

Attributes
ACN	184374
Time
Date	199107
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sac
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bur
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : captain instruction : trainee
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 25 flight time total : 850 flight time type : 4
ASRS Report	184374
Person 2
Affiliation	Other
Function	flight crew : first officer instruction : instructor oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 120 flight time total : 9200 flight time type : 2000
ASRS Report	184373
Events
Anomaly	aircraft equipment problem : critical conflict : ground critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I was receiving instruction on simulated single engine approach and lndgs. Downwind to base leg the gear was extended and confirmed with 3 green lights, also 20 degree flaps. Final at full flaps and confirmed with 3 green down and locked. My instructor took the airplane at 50 +/- ft AGL and landed normally. As airspeed dissipated the aircraft began to yaw to the right as if it had a flat tire. As we slowed, the right wing lowered and we veered off the runway into the grass median and stopped. We retarded throttles/mixture/fuel and all switches and exited the plane on the left side. The gear strut appears to have failed and punctured the skin on the wing and bent the propeller.

Original NASA ASRS Text

Title: ACFT EQUIP PROBLEM AS SMA TWIN'S GEAR COLLAPSES ON LNDG.

Narrative: I WAS RECEIVING INSTRUCTION ON SIMULATED SINGLE ENG APCH AND LNDGS. DOWNWIND TO BASE LEG THE GEAR WAS EXTENDED AND CONFIRMED WITH 3 GREEN LIGHTS, ALSO 20 DEG FLAPS. FINAL AT FULL FLAPS AND CONFIRMED WITH 3 GREEN DOWN AND LOCKED. MY INSTRUCTOR TOOK THE AIRPLANE AT 50 +/- FT AGL AND LANDED NORMALLY. AS AIRSPD DISSIPATED THE ACFT BEGAN TO YAW TO THE R AS IF IT HAD A FLAT TIRE. AS WE SLOWED, THE R WING LOWERED AND WE VEERED OFF THE RWY INTO THE GRASS MEDIAN AND STOPPED. WE RETARDED THROTTLES/MIXTURE/FUEL AND ALL SWITCHES AND EXITED THE PLANE ON THE L SIDE. THE GEAR STRUT APPEARS TO HAVE FAILED AND PUNCTURED THE SKIN ON THE WING AND BENT THE PROP.

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.