A cessna cardinal 177RG had the landing gear collapse on landing at 50R.

Attributes
ACN	447171
Time
Date	199908
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 50r.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Cardinal 177/177RG
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	landing : roll
Route In Use	approach : visual
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi
Experience	flight time last 90 days : 240 flight time total : 2300 flight time type : 160
ASRS Report	447171
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 55 flight time total : 255 flight time type : 5
ASRS Report	446807
Events
Anomaly	ground encounters : gear up landing
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

While practicing emergency procedures in the traffic pattern, a landing gear failure was experienced on the third landing. On the first approach the circuit breaker for the landing gear was pulled. The gear was let down with the emergency handle. The circuit breaker was pushed in but 'popped' out after 2 or 3 seconds. The second approach was performed to confirm the circuit breaker would not pop again before we continued training. On the third approach the gear deployed normally and was confirmed with the indicator light, a visual outside the aircraft and a lack of warning horn, the landing gear collapsed on touchdown and no injuries occurred. The airplane suffered very little damage and no property damage was observed. Supplemental information from acn 446807: the circuit breaker for the landing gear was pulled, and the gear was let down with the emergency handle. The circuit breaker was pushed in but 'popped' out after 2 or 3 seconds. Second approach was performed to confirm the circuit breaker would not pop again before we continued.

Original NASA ASRS Text

Title: A CESSNA CARDINAL 177RG HAD THE LNDG GEAR COLLAPSE ON LNDG AT 50R.

Narrative: WHILE PRACTICING EMER PROCS IN THE TFC PATTERN, A LNDG GEAR FAILURE WAS EXPERIENCED ON THE THIRD LNDG. ON THE FIRST APCH THE CIRCUIT BREAKER FOR THE LNDG GEAR WAS PULLED. THE GEAR WAS LET DOWN WITH THE EMER HANDLE. THE CIRCUIT BREAKER WAS PUSHED IN BUT 'POPPED' OUT AFTER 2 OR 3 SECONDS. THE SECOND APCH WAS PERFORMED TO CONFIRM THE CIRCUIT BREAKER WOULD NOT POP AGAIN BEFORE WE CONTINUED TRAINING. ON THE THIRD APCH THE GEAR DEPLOYED NORMALLY AND WAS CONFIRMED WITH THE INDICATOR LIGHT, A VISUAL OUTSIDE THE ACFT AND A LACK OF WARNING HORN, THE LNDG GEAR COLLAPSED ON TOUCHDOWN AND NO INJURIES OCCURRED. THE AIRPLANE SUFFERED VERY LITTLE DAMAGE AND NO PROPERTY DAMAGE WAS OBSERVED. SUPPLEMENTAL INFO FROM ACN 446807: THE CIRCUIT BREAKER FOR THE LNDG GEAR WAS PULLED, AND THE GEAR WAS LET DOWN WITH THE EMER HANDLE. THE CIRCUIT BREAKER WAS PUSHED IN BUT 'POPPED' OUT AFTER 2 OR 3 SECONDS. SECOND APCH WAS PERFORMED TO CONFIRM THE CIRCUIT BREAKER WOULD NOT POP AGAIN BEFORE WE CONTINUED.

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.