What was found
PILOT LOGBOOK ENTRY "AIRCRAFT YAWS VIOLENTLY TO RIGHT UPON LANDING. AIRCRAFT FERRIED FROM ACK TO ALB MAINTENANCE BASE. INSPECTOR AT ALB PERFORMED GROUND RUNS OF BOTH ENGINES AND FOUND NO ABNORMALITIES. OVERNIGHT MAINTENANCE REPLACED THE LEFT PROPELLER CONTROL UNIT AND GROUND OPERATIONAL / LEAK CHECKS WERE SATISFACTORY. AN OPERATIONAL CHECK FLIGHT WAS PERFORMED SUBSEQUENT TO THE PROPELLER CONTROL UNIT CHANGE AND THE CREW SIGNED OFF THE OCF AS SATISFACTORY. WHEN QUESTIONED BY INSPECTOR FOLLOWING OCF, CHECK PILOT STATED THAT THE FLIGHT AND LANDING WAS CONSISTENT WITH OTHER SAABS.