GA small aircraft gear collapse after landing.

Attributes
ACN	144001
Time
Date	199004
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : olv
State Reference	MS
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, High 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 : 35 flight time total : 8000
ASRS Report	144001
Person 2
Function	oversight : airport manager
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

About 3-4 weeks prior to incident new radios were installed. Aircraft was flown to test same. Passenger was radio installer. Takeoff normal and gear retraction appeared normal with amber light illuminated. Landing was normal, but reaching ramp were met by airport manager with a pair of binoculars. He stated that he had observed aircraft in flight and gear was only about 1/2 retracted. Hydraulic fluid and gear lights were checked and found normal. Aircraft was then flown again. Gear retracted normally, was recycled and again all normal as was landing. On day of incident, approach normal and gear light showed green. Immediately after contact with runway, gear retracted and aircraft settled gently on runway. Gear horn never sounded. I am unable to account for either anomaly mentioned.

Original NASA ASRS Text

Title: GA SMA GEAR COLLAPSE AFTER LNDG.

Narrative: ABOUT 3-4 WKS PRIOR TO INCIDENT NEW RADIOS WERE INSTALLED. ACFT WAS FLOWN TO TEST SAME. PAX WAS RADIO INSTALLER. TKOF NORMAL AND GEAR RETRACTION APPEARED NORMAL WITH AMBER LIGHT ILLUMINATED. LNDG WAS NORMAL, BUT REACHING RAMP WERE MET BY ARPT MGR WITH A PAIR OF BINOCULARS. HE STATED THAT HE HAD OBSERVED ACFT IN FLT AND GEAR WAS ONLY ABOUT 1/2 RETRACTED. HYD FLUID AND GEAR LIGHTS WERE CHKED AND FOUND NORMAL. ACFT WAS THEN FLOWN AGAIN. GEAR RETRACTED NORMALLY, WAS RECYCLED AND AGAIN ALL NORMAL AS WAS LNDG. ON DAY OF INCIDENT, APCH NORMAL AND GEAR LIGHT SHOWED GREEN. IMMEDIATELY AFTER CONTACT WITH RWY, GEAR RETRACTED AND ACFT SETTLED GENTLY ON RWY. GEAR HORN NEVER SOUNDED. I AM UNABLE TO ACCOUNT FOR EITHER ANOMALY MENTIONED.

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.