What was found
DURING FIRST ROUTINE 72 MONTH INSPECTION ON THIS AIRCRAFT, WHEN RIGHT WING WEDGE WAS REMOVED, INSPECTION FOUND THE INBOARD SUPPORT CHANNEL, P/N 1159W20194-1XD, S/N 860100 WAS CRACKED. THIS WAS CAUSED BY IMPROPER INSTALLATION DURING AIRCRAFT PRODUCTION. THE WING WEDGE HAS TO SLOPE TO INTERFACE WITH THE WING. THIS WING WEDGE WAS FLAT, CAUSING STRESS ON THE CHANNEL, WHICH THEN CRACKED. (M)