What was found
(AUS) RT WING COMPONENTS CRACKED. COMPONENTS AFFECTED INCLUDE: TRAILING EDGE RIB LOCATED AT STA 23.625. WING ROOT RT RIB ASSY LOCATED AT STA 23.625, WING SPAR REINFORCEMENT FITTING, WHEN CHANGING TRAILING EDGE RIB LOCATED AT WS 23.625, IT WAS NOTED THAT RIVETING HAD BEEN INCORRECTLY CARRIED OUT WITH 1/8 IN RIVETS IN 5/32 IN HOLES (SOME NOT ALL). WHEN SEALER WAS REMOVED FROM THE WING ROOT AT STA 23.625, THREE CRACKS WERE FOUND IN THE PART (RIB ASSEMBLY - WING ROOT). SUSPECT REPAIRS CARRIED OUT IN USA PRIOR TO AIRCRAFT ARRIVAL IN AUSTRALIA. PERSONNEL/MAINTENANCE ERROR. UNAPPROVED PART.