C310 pilot has a right gear problem, will not retract nor extend. No green safe light on gear down position. Lands with right engine shut down, propeller feathered. Right gear collapses. Bolt on overctr locking arm that retracts, extends and locks gear, was sheared.

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Attributes
ACN	363577
Time
Date	199703
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 1mt
State Reference	AR
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 135 flight time total : 2600 flight time type : 1000
ASRS Report	363577
Person 2
Affiliation	Other
Function	other personnel
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other other : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	other Other
Supplementary
Primary Problem	Aircraft

Narrative:

Upon climb out at hut (field of departure), I noticed that the nosegear was still fully extended and the right main was partially retracted when the gear was retracted, and no gear up light indication. I cycled the gear and would get a green down light, but could visually (through the mirrors on the main fuel tanks) tell that the right main was not down and locking. I proceeded to my home airport 40 mi away and called the unicom, asking for our mechanic to give me a visual during low approach. His indications were that the gear was down and locked. Upon landing the second pass, I shut the right engine down and feathered the propeller as a precaution. As the aircraft's landing rollout was coming to a halt, the right gear collapsed. The reason: bolt on overctr locking arm had sheared.

Original NASA ASRS Text

Title: C310 PLT HAS A R GEAR PROB, WILL NOT RETRACT NOR EXTEND. NO GREEN SAFE LIGHT ON GEAR DOWN POS. LANDS WITH R ENG SHUT DOWN, PROP FEATHERED. R GEAR COLLAPSES. BOLT ON OVERCTR LOCKING ARM THAT RETRACTS, EXTENDS AND LOCKS GEAR, WAS SHEARED.

Narrative: UPON CLBOUT AT HUT (FIELD OF DEP), I NOTICED THAT THE NOSEGEAR WAS STILL FULLY EXTENDED AND THE R MAIN WAS PARTIALLY RETRACTED WHEN THE GEAR WAS RETRACTED, AND NO GEAR UP LIGHT INDICATION. I CYCLED THE GEAR AND WOULD GET A GREEN DOWN LIGHT, BUT COULD VISUALLY (THROUGH THE MIRRORS ON THE MAIN FUEL TANKS) TELL THAT THE R MAIN WAS NOT DOWN AND LOCKING. I PROCEEDED TO MY HOME ARPT 40 MI AWAY AND CALLED THE UNICOM, ASKING FOR OUR MECH TO GIVE ME A VISUAL DURING LOW APCH. HIS INDICATIONS WERE THAT THE GEAR WAS DOWN AND LOCKED. UPON LNDG THE SECOND PASS, I SHUT THE R ENG DOWN AND FEATHERED THE PROP AS A PRECAUTION. AS THE ACFT'S LNDG ROLLOUT WAS COMING TO A HALT, THE R GEAR COLLAPSED. THE REASON: BOLT ON OVERCTR LOCKING ARM HAD SHEARED.

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.