Aircraft veered right on rollout, then right gear collapsed. Aircraft evacuated.

Attributes
ACN	112402
Time
Date	198905
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 240 flight time total : 15500 flight time type : 1325
ASRS Report	112402
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
ASRS Report	112418
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : insufficient time
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

About 2-3 seconds after normal landing in denver on 26R at about XA00 pm, we felt tremendous vibration and the aircraft began to veer to the right. Utilized rudder, and later nosewheel steering, to maintain directional control. Braking action was severely reduced, but brought aircraft to a stop near end of runway. Right main gear then collapsed and I initiated the emergency evacuate/evacuation (right side exits and tail cone). The fire crew (through open forward right emergency exit, informed us that there was fuel leakage, so we completed only immediately action items on checklist and left to assist in evacuate/evacuation. It went smoothly. At this point we have no knowledge of cause. Supplemental information from acn 112418: suspect mechanical failure of 'scissor' mechanism which allowed wheels to rotate on or shortly after touchdown. Skidding the dual mains sideways at 100 KTS in my opinion caused the severe shatter and loss of right braking.

Original NASA ASRS Text

Title: ACFT VEERED RIGHT ON ROLLOUT, THEN RIGHT GEAR COLLAPSED. ACFT EVACUATED.

Narrative: ABOUT 2-3 SECONDS AFTER NORMAL LNDG IN DENVER ON 26R AT ABOUT XA00 PM, WE FELT TREMENDOUS VIBRATION AND THE ACFT BEGAN TO VEER TO THE RIGHT. UTILIZED RUDDER, AND LATER NOSEWHEEL STEERING, TO MAINTAIN DIRECTIONAL CONTROL. BRAKING ACTION WAS SEVERELY REDUCED, BUT BROUGHT ACFT TO A STOP NEAR END OF RWY. RIGHT MAIN GEAR THEN COLLAPSED AND I INITIATED THE EMER EVAC (RIGHT SIDE EXITS AND TAIL CONE). THE FIRE CREW (THROUGH OPEN FORWARD RIGHT EMER EXIT, INFORMED US THAT THERE WAS FUEL LEAKAGE, SO WE COMPLETED ONLY IMMEDIATELY ACTION ITEMS ON CHECKLIST AND LEFT TO ASSIST IN EVAC. IT WENT SMOOTHLY. AT THIS POINT WE HAVE NO KNOWLEDGE OF CAUSE. SUPPLEMENTAL INFORMATION FROM ACN 112418: SUSPECT MECHANICAL FAILURE OF 'SCISSOR' MECHANISM WHICH ALLOWED WHEELS TO ROTATE ON OR SHORTLY AFTER TOUCHDOWN. SKIDDING THE DUAL MAINS SIDEWAYS AT 100 KTS IN MY OPINION CAUSED THE SEVERE SHATTER AND LOSS OF RIGHT BRAKING.

Data retrieved from NASA's ASRS site as of August 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.