Landing gear collapses during landing roll.

Attributes
ACN	243611
Time
Date	199306
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : rid
State Reference	IN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 36 flight time total : 725 flight time type : 12
ASRS Report	243611
Events
Anomaly	non adherence other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Immediately before flight, the retractable gear circuit breaker was observed to be defective and was replaced. Flight was conducted to rid where touch and go lndgs were made. After the second or third takeoff, the landing gear circuit breaker disengaged. It was pushed or re-engaged and the landing gear cycled properly. During the last landing, the aircraft contacted the runway unsupported by the landing gear. Involvement of the landing gear mechanism in this incident is possible. It is more probable that the collapse of the landing gear was caused by an inadvertent landing gear retraction by the pilot intending to retract the flaps. This type and model of aircraft has the gear and flap switches in a reverse position from all other retractable gear aircraft previously flown by the pilot. Although the pilot's recollection is that the landing gear collapsed on rollout following the landing, the physical evidence seems to suggest that the landing gear was not extended prior to landing. However, final approach was made at a very low power setting and no warning horn sounded. Standardized placement of the landing gear switch could help prevent this type incident.

Original NASA ASRS Text

Title: LNDG GEAR COLLAPSES DURING LNDG ROLL.

Narrative: IMMEDIATELY BEFORE FLT, THE RETRACTABLE GEAR CIRCUIT BREAKER WAS OBSERVED TO BE DEFECTIVE AND WAS REPLACED. FLT WAS CONDUCTED TO RID WHERE TOUCH AND GO LNDGS WERE MADE. AFTER THE SECOND OR THIRD TKOF, THE LNDG GEAR CIRCUIT BREAKER DISENGAGED. IT WAS PUSHED OR RE-ENGAGED AND THE LNDG GEAR CYCLED PROPERLY. DURING THE LAST LNDG, THE ACFT CONTACTED THE RWY UNSUPPORTED BY THE LNDG GEAR. INVOLVEMENT OF THE LNDG GEAR MECHANISM IN THIS INCIDENT IS POSSIBLE. IT IS MORE PROBABLE THAT THE COLLAPSE OF THE LNDG GEAR WAS CAUSED BY AN INADVERTENT LNDG GEAR RETRACTION BY THE PLT INTENDING TO RETRACT THE FLAPS. THIS TYPE AND MODEL OF ACFT HAS THE GEAR AND FLAP SWITCHES IN A REVERSE POS FROM ALL OTHER RETRACTABLE GEAR ACFT PREVIOUSLY FLOWN BY THE PLT. ALTHOUGH THE PLT'S RECOLLECTION IS THAT THE LNDG GEAR COLLAPSED ON ROLLOUT FOLLOWING THE LNDG, THE PHYSICAL EVIDENCE SEEMS TO SUGGEST THAT THE LNDG GEAR WAS NOT EXTENDED PRIOR TO LNDG. HOWEVER, FINAL APCH WAS MADE AT A VERY LOW PWR SETTING AND NO WARNING HORN SOUNDED. STANDARDIZED PLACEMENT OF THE LNDG GEAR SWITCH COULD HELP PREVENT THIS TYPE INCIDENT.

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.