Air carrier mdt had right main gear failure after landing at iad.

Attributes
ACN	199419
Time
Date	199201
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iad
State Reference	VA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5000 flight time type : 800
ASRS Report	199419
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6000 flight time type : 800
ASRS Report	199420
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

A normal approach and landing was made to runway 1R. Shortly after lift dumper deployment aircraft began to shimmy. Shimmy became more pronounced as aircraft decelerated. Shimmy stopped as aircraft settled to the right followed by loud scraping sound and vibration. Directional control was maintained with left brake and nose wheel steering. Tower was called with a request for assistance. Visual inspection revealed no need for immediate evacuate/evacuation. After short time fire equipment arrived. Passenger and crew deplaned by airstairs and were transported to terminal by ground transportation. No injuries to passenger or crew. I suspect right main gear torque link or scissors failed allowing the main wheels to freely caster at high speed causing wheels to depart aircraft. Aircraft skidded to stop on right axle. Recommend inspecting scissor links. Crew did a super job.

Original NASA ASRS Text

Title: ACR MDT HAD R MAIN GEAR FAILURE AFTER LNDG AT IAD.

Narrative: A NORMAL APCH AND LNDG WAS MADE TO RWY 1R. SHORTLY AFTER LIFT DUMPER DEPLOYMENT ACFT BEGAN TO SHIMMY. SHIMMY BECAME MORE PRONOUNCED AS ACFT DECELERATED. SHIMMY STOPPED AS ACFT SETTLED TO THE R FOLLOWED BY LOUD SCRAPING SOUND AND VIBRATION. DIRECTIONAL CTL WAS MAINTAINED WITH L BRAKE AND NOSE WHEEL STEERING. TWR WAS CALLED WITH A REQUEST FOR ASSISTANCE. VISUAL INSPECTION REVEALED NO NEED FOR IMMEDIATE EVAC. AFTER SHORT TIME FIRE EQUIP ARRIVED. PAX AND CREW DEPLANED BY AIRSTAIRS AND WERE TRANSPORTED TO TERMINAL BY GND TRANSPORTATION. NO INJURIES TO PAX OR CREW. I SUSPECT R MAIN GEAR TORQUE LINK OR SCISSORS FAILED ALLOWING THE MAIN WHEELS TO FREELY CASTER AT HIGH SPD CAUSING WHEELS TO DEPART ACFT. ACFT SKIDDED TO STOP ON R AXLE. RECOMMEND INSPECTING SCISSOR LINKS. CREW DID A SUPER JOB.

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.