What was found
(CAN) DURING THE INSPECTION OF CPCP CARD NR C57-530-02-01 (48 MONTH) LEVEL 3 CORROSION. EXFOLIATION WAS FOUND ON THE LOWER CORNER BRACKET OF THE RT AILERON 1/B HINGE RIB AT THE RIB 20 LOCATION. P/N: HC572H0761-003. ONCE THE RT AILERON 1/B HINGE RIB WAS REMOVED FROM THE AIRCRAFT FOR CORNER BRACKET REPLACEMENT, IT WAS FURTHER NOTICED THAT THE UPPER CORNER BRACKET ALSO SHOWED SIGNS OF LEVEL 3 CORROSION. P/N: HC572H0761-001. WE WERE ABLE TO LOCATE A NEW REPLACEMENT PART FOR THE LOWER CORNER P/N: HC572H0761-003, BUT THE UPPER CORNER BRACKET P/N: HC572H0761-001 WAS NOT PROCURABLE AT BAE OR ON THE OPEN MARKET. THEREFORE WE APPLIED TO BAE RDO FOR A REPAIR TO THE UPPER CORNER BRACKET, IN WHICH THEY ISSUED SSQ NR 48537, SHORTLY AFTER THE SSQ WAS ISSUED, AVALON AERO WAS ABLE TO PROCURE A NEW BRACKET FROM ANOTHER OPERATOR. WE HAVE NOW INSTALLED NEW UPPER AND LOWER CORNER BRACKETS ON THE RT AILERON 1/B HINGE RIB AT THE RIB 20 LOCATION. THEREFORE ANY INSPECTIONS THAT WERE CALLED OUT IN SSQ NR 48537 WILL NO LONGER BE REQUIRED. BRACKETS CURRENTLY IN NCFS POSSESSION. (TC# 20180529015)