Loss of aircraft control during landing procedure.

Attributes
ACN	291530
Time
Date	199412
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : eug
State Reference	OR
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : msy
Operator	common carrier : air taxi
Make Model Name	Chancellor 414A & C414
Operating Under FAR Part	Part 135
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 3500
ASRS Report	291530
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : regained aircraft control
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Departed oth at approximately XX40AM on part 135 air ambulance transfer in a C-414A. Executed a VOR DME 3 approach. Broke out at about 3 to 4 mi from airport and landed straight-in on runway 3. Normal operations until a few seconds after touchdown when the plane started pulling sharply to the left. I pulled the power back to idle and tried to control the pulling with brakes but that only caused a shutter. I then reverted to controling the plane with a lot of differential power. Somehow managed to keep the plane on the runway. Being confused with what happened after coming to a stop, I checked that I still had 3 green lights for the gear and proceeded forward to check the brakes and directional control while taxiing off the runway. Everything operated normally. I asked ground control if he saw smoke or anything else unusual -- he said negative. I taxied in to drop off the patient and asked to have the mechanics meet me at the plane. The patient asked if there was an icing problem on the runway, but other than that, didn't seem to be aware of any serious problems. The mechanics put jacks under the left wing and noted the scissor arm broke loose and the tire had rotated 180 degrees. I later found out that the scissor arm may have been assembled incorrectly. An investigation now seems to be started by FAA to see who and why it was put on wrong.

Original NASA ASRS Text

Title: LOSS OF ACFT CTL DURING LNDG PROC.

Narrative: DEPARTED OTH AT APPROX XX40AM ON PART 135 AIR AMBULANCE TRANSFER IN A C-414A. EXECUTED A VOR DME 3 APCH. BROKE OUT AT ABOUT 3 TO 4 MI FROM ARPT AND LANDED STRAIGHT-IN ON RWY 3. NORMAL OPS UNTIL A FEW SECONDS AFTER TOUCHDOWN WHEN THE PLANE STARTED PULLING SHARPLY TO THE L. I PULLED THE PWR BACK TO IDLE AND TRIED TO CTL THE PULLING WITH BRAKES BUT THAT ONLY CAUSED A SHUTTER. I THEN REVERTED TO CTLING THE PLANE WITH A LOT OF DIFFERENTIAL PWR. SOMEHOW MANAGED TO KEEP THE PLANE ON THE RWY. BEING CONFUSED WITH WHAT HAPPENED AFTER COMING TO A STOP, I CHKED THAT I STILL HAD 3 GREEN LIGHTS FOR THE GEAR AND PROCEEDED FORWARD TO CHK THE BRAKES AND DIRECTIONAL CTL WHILE TAXIING OFF THE RWY. EVERYTHING OPERATED NORMALLY. I ASKED GND CTL IF HE SAW SMOKE OR ANYTHING ELSE UNUSUAL -- HE SAID NEGATIVE. I TAXIED IN TO DROP OFF THE PATIENT AND ASKED TO HAVE THE MECHS MEET ME AT THE PLANE. THE PATIENT ASKED IF THERE WAS AN ICING PROB ON THE RWY, BUT OTHER THAN THAT, DIDN'T SEEM TO BE AWARE OF ANY SERIOUS PROBS. THE MECHS PUT JACKS UNDER THE L WING AND NOTED THE SCISSOR ARM BROKE LOOSE AND THE TIRE HAD ROTATED 180 DEGS. I LATER FOUND OUT THAT THE SCISSOR ARM MAY HAVE BEEN ASSEMBLED INCORRECTLY. AN INVESTIGATION NOW SEEMS TO BE STARTED BY FAA TO SEE WHO AND WHY IT WAS PUT ON WRONG.

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.