C421 right landing gear sheared off causing the aircraft to skid off the right side of the runway.

Attributes
ACN	558504
Time
Date	200209
Day	Mon
Local Time Of Day	0601 To 1200
Place
State Reference	IL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Golden Eagle 421
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : private
Experience	flight time last 90 days : 20.3 flight time total : 1600 flight time type : 200
ASRS Report	558504
Person 2
Function	observation : passenger
Events
Anomaly	excursion : runway other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While landing at 3MY (wind 190 degrees at 6 KTS) runway 17, I felt and heard a pop -- like the right trim ruptured. Approach to runway 17 was normal. Over the fence at 90-95 KTS. Checklist completed. 3 green lights on gear and visual confirmation of gear down. Upon touchdown, the right gear sheared off and aircraft skidded off runway west side. I shut down all power, electrical, fuel, and my son and I exited the aircraft. I have no knowledge of what exactly caused incident. Aircraft received damage to right gear, right propeller and leading edge of wing.

Original NASA ASRS Text

Title: C421 R LNDG GEAR SHEARED OFF CAUSING THE ACFT TO SKID OFF THE R SIDE OF THE RWY.

Narrative: WHILE LNDG AT 3MY (WIND 190 DEGS AT 6 KTS) RWY 17, I FELT AND HEARD A POP -- LIKE THE R TRIM RUPTURED. APCH TO RWY 17 WAS NORMAL. OVER THE FENCE AT 90-95 KTS. CHKLIST COMPLETED. 3 GREEN LIGHTS ON GEAR AND VISUAL CONFIRMATION OF GEAR DOWN. UPON TOUCHDOWN, THE R GEAR SHEARED OFF AND ACFT SKIDDED OFF RWY W SIDE. I SHUT DOWN ALL PWR, ELECTRICAL, FUEL, AND MY SON AND I EXITED THE ACFT. I HAVE NO KNOWLEDGE OF WHAT EXACTLY CAUSED INCIDENT. ACFT RECEIVED DAMAGE TO R GEAR, R PROP AND LEADING EDGE OF WING.

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.