What was found
WHEN DEPLOYING SPEED BRAKES, ACFT MOMENTARILY YAWS LT, AUTOPILOT ON OR OFF. THE EFFECT OF THIS YAW IS ABOUT 2 TO 3 DEGREES COMPASS, NO HEADING. ACFT RECOVERS TO ORIGINAL HEADING WITH AUTOPILOT ON. SPOILER & SPEED BRAKE SYS INSPECTED. RT WING SPOILERS NR 1 & 4 FOUND MISADJUSTED. RT WING SPOILERS NR 1 & 4 ADJUSTED IAW 27-64-00-820-001-C.