What was found
(CAN) DURING CUSTOMER ACCEPTANCE FLT, UPON TOUCH DOWN & AFTER APPLICAITON OF FULL THRUST REVERSER POWER, A/C VEERED TO RT APPROX. 30 TO 40 DEGS FROM RWY HEADING. CORRECTIVE ACTION TO STOW THRUST REVERSERS & CONTROL DIRECTIONAL CONTROL USING RUDDER. INVESTIGATION REVEALED THAT THRUST REVERSER OF LT ENGINE INCORRECTLY INSTALLED. THRUST REVERSER CASCADE VANES WERE NOT POSED AT APPROPRIATE LOCATION FOR LT ENGINE.