Narrative:

During rollout below 40 KTS, transfer of controls were handed back over to the captain, PIC. While rolling out to catch the next taxiway, we experienced a moderate shaking from the left side of the aircraft. The captain assumed a flat tire and verbally commented the situation to me. The shaking became more violent and a direction control became an issue. The nose started slowly drifting to the left of the centerline and I noticed the captain fighting the controls trying to keep the nose from drifting. At that time I got on the rudders and assisted the captain with full right rudder and applying right brake. The nose all came to rest approximately 70-80 degrees off runway heading, resting on the concrete. We secured the aircraft and checked on the passenger. Bused passenger to terminal. After opening and disembarking the aircraft, I visually inspected the left landing gear. At this time, I noticed the lower wheel housing that the wheel axle and brake assembly are attached to cracked off and the entire wheel assembly turned 90 degrees sideways and the scissor joint jammed and locked the wheels up. The housing where the pivot pin on the housing, is what cracked and broke off from both sides of the shock tube. The mechanics came and jacked up and straightened, then temporary bolted the shock strut straight and was then towed the aircraft away. I showed the mechanic that the housing was cracked for a long time because of the oxidation and rust particles on the snapped off piece. Callback conversation with reporter revealed the following information: the reporter stated the lower fitting on the piston that connects to the lower link cracked off and allowed the wheels to turn 90 degrees to the runway heading. The reporter said the casting must have been cracked for a long time because of the rust and oxidation on the broken fitting.

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Original NASA ASRS Text

Title: A BEECH 1900D ON LNDG EXPERIENCED VIOLENT SHAKING AND SLOWLY VEERED TO L OF THE RWY AND STOPPED 80 DEGS OFF RWY HDG.

Narrative: DURING ROLLOUT BELOW 40 KTS, TRANSFER OF CTLS WERE HANDED BACK OVER TO THE CAPT, PIC. WHILE ROLLING OUT TO CATCH THE NEXT TXWY, WE EXPERIENCED A MODERATE SHAKING FROM THE L SIDE OF THE ACFT. THE CAPT ASSUMED A FLAT TIRE AND VERBALLY COMMENTED THE SIT TO ME. THE SHAKING BECAME MORE VIOLENT AND A DIRECTION CTL BECAME AN ISSUE. THE NOSE STARTED SLOWLY DRIFTING TO THE L OF THE CTRLINE AND I NOTICED THE CAPT FIGHTING THE CTLS TRYING TO KEEP THE NOSE FROM DRIFTING. AT THAT TIME I GOT ON THE RUDDERS AND ASSISTED THE CAPT WITH FULL R RUDDER AND APPLYING R BRAKE. THE NOSE ALL CAME TO REST APPROX 70-80 DEGS OFF RWY HDG, RESTING ON THE CONCRETE. WE SECURED THE ACFT AND CHECKED ON THE PAX. BUSED PAX TO TERMINAL. AFTER OPENING AND DISEMBARKING THE ACFT, I VISUALLY INSPECTED THE L LNDG GEAR. AT THIS TIME, I NOTICED THE LOWER WHEEL HOUSING THAT THE WHEEL AXLE AND BRAKE ASSEMBLY ARE ATTACHED TO CRACKED OFF AND THE ENTIRE WHEEL ASSEMBLY TURNED 90 DEGS SIDEWAYS AND THE SCISSOR JOINT JAMMED AND LOCKED THE WHEELS UP. THE HOUSING WHERE THE PIVOT PIN ON THE HOUSING, IS WHAT CRACKED AND BROKE OFF FROM BOTH SIDES OF THE SHOCK TUBE. THE MECHANICS CAME AND JACKED UP AND STRAIGHTENED, THEN TEMPORARY BOLTED THE SHOCK STRUT STRAIGHT AND WAS THEN TOWED THE ACFT AWAY. I SHOWED THE MECHANIC THAT THE HOUSING WAS CRACKED FOR A LONG TIME BECAUSE OF THE OXIDATION AND RUST PARTICLES ON THE SNAPPED OFF PIECE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE LOWER FITTING ON THE PISTON THAT CONNECTS TO THE LOWER LINK CRACKED OFF AND ALLOWED THE WHEELS TO TURN 90 DEGS TO THE RWY HDG. THE RPTR SAID THE CASTING MUST HAVE BEEN CRACKED FOR A LONG TIME BECAUSE OF THE RUST AND OXIDATION ON THE BROKEN FITTING.

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.