Gear collapse on landing.

Attributes
ACN	180114
Time
Date	199106
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : mkc
State Reference	MO
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 Transport, Low Wing, 2 Recip Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 30 flight time total : 7000 flight time type : 30
ASRS Report	180114
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	flight crew : declared emergency none taken : unable
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

For 5 yrs we have been getting an unsafe on lowering our landing gear. This on numerous occasions. We have done tower fly-by's and have had fire and emergency equipment on runways numerous times. The gear has been inspected at oma, fxe, mkt. Never could find a problem, except possibly the microswitch out of adjustment. Had the problem last week landing mkt. Departed mkt for fcm. On approach, I lowered the landing gear. The unsafe light and gear horn sounded. Flew over aircraft awaiting departure on 9R and asked if gears appeared down. Was told they were down. Landed, and as always happened until now, the green lights all came on upon T/D, and again no problem. Departed for mkc and lowered gears for landing at mkc. Got an unsafe light and horn, but decided that this was a malfunction in the warning system and proceeded with landing. On T/D the right main gear collapsed.

Original NASA ASRS Text

Title: GEAR COLLAPSE ON LNDG.

Narrative: FOR 5 YRS WE HAVE BEEN GETTING AN UNSAFE ON LOWERING OUR LNDG GEAR. THIS ON NUMEROUS OCCASIONS. WE HAVE DONE TWR FLY-BY'S AND HAVE HAD FIRE AND EMER EQUIP ON RWYS NUMEROUS TIMES. THE GEAR HAS BEEN INSPECTED AT OMA, FXE, MKT. NEVER COULD FIND A PROB, EXCEPT POSSIBLY THE MICROSWITCH OUT OF ADJUSTMENT. HAD THE PROB LAST WEEK LNDG MKT. DEPARTED MKT FOR FCM. ON APCH, I LOWERED THE LNDG GEAR. THE UNSAFE LIGHT AND GEAR HORN SOUNDED. FLEW OVER ACFT AWAITING DEP ON 9R AND ASKED IF GEARS APPEARED DOWN. WAS TOLD THEY WERE DOWN. LANDED, AND AS ALWAYS HAPPENED UNTIL NOW, THE GREEN LIGHTS ALL CAME ON UPON T/D, AND AGAIN NO PROB. DEPARTED FOR MKC AND LOWERED GEARS FOR LNDG AT MKC. GOT AN UNSAFE LIGHT AND HORN, BUT DECIDED THAT THIS WAS A MALFUNCTION IN THE WARNING SYS AND PROCEEDED WITH LNDG. ON T/D THE RIGHT MAIN GEAR COLLAPSED.

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.