Left main landing gear collapses on landing rollout.

Attributes
ACN	271350
Time
Date	199405
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : oun
State Reference	OK
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Baron 55/Cochise
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 125 flight time total : 5500 flight time type : 4
ASRS Report	271350
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During landing roll, check pilot flying single engine approach, aircraft landing was normal. Left engine at idle, aircraft settled to left side. Designated examiner said he thought we were getting a flat. Then left main landing gear collapsed. Aircraft came to rest approximately 50 ft off runway. Other wheels remained down and locked. Left main tire had a hole, but did not explode or damage wheel. Speed was approximately 40 KTS at time of collapse. Aircraft was a 1964 model, was used daily as a trainer. I believe the gear was fatigued since the collapse occurred on a normal landing with a 'green' gear down light. Tire was intact as was the wheel assembly. There was no damage to surrounding area of wheel well. There was no excessive vibration from the flat tire to cause a gear collapse under normal conditions.

Original NASA ASRS Text

Title: L MAIN LNDG GEAR COLLAPSES ON LNDG ROLLOUT.

Narrative: DURING LNDG ROLL, CHK PLT FLYING SINGLE ENG APCH, ACFT LNDG WAS NORMAL. L ENG AT IDLE, ACFT SETTLED TO L SIDE. DESIGNATED EXAMINER SAID HE THOUGHT WE WERE GETTING A FLAT. THEN L MAIN LNDG GEAR COLLAPSED. ACFT CAME TO REST APPROX 50 FT OFF RWY. OTHER WHEELS REMAINED DOWN AND LOCKED. L MAIN TIRE HAD A HOLE, BUT DID NOT EXPLODE OR DAMAGE WHEEL. SPD WAS APPROX 40 KTS AT TIME OF COLLAPSE. ACFT WAS A 1964 MODEL, WAS USED DAILY AS A TRAINER. I BELIEVE THE GEAR WAS FATIGUED SINCE THE COLLAPSE OCCURRED ON A NORMAL LNDG WITH A 'GREEN' GEAR DOWN LIGHT. TIRE WAS INTACT AS WAS THE WHEEL ASSEMBLY. THERE WAS NO DAMAGE TO SURROUNDING AREA OF WHEEL WELL. THERE WAS NO EXCESSIVE VIBRATION FROM THE FLAT TIRE TO CAUSE A GEAR COLLAPSE UNDER NORMAL CONDITIONS.

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.