What was found
(CAN) EXCESSIVE CORROSION FOUND ON FLAP TRACKS NR 4 AND NR 5 ON BOTH LT AND RT WINGS DURING 60K REPLACEMENT OF FLAP TRACKS. SUPPORT BRACKETS REMOVED FOR TRANSFER TO NEW BEAMS, CORROSION FOUND IN RECESSES OF TRACKS BEHIND BRACKETS. LT NR 4 TRACK FOUND FULL OF WATER, BOTH SIDES OF BRACKET APPEARS TO BE NEWER BRACKET. RUST STARTING TO FORM BELOW PAINT. NR 4 LT: P/N 85780009-011; NR 4 RT: P/N 85780009-112; NR 5 LT: P/N 85780010-007; NR 5 RT: P/N 85780010-008. RECTIFICATION: FLAP TRACKS REPLACED AS PART OF THE 60K WORK PACKAGE REQUIREMENT. FURTHER INSPECTION OF CORROSION AND CAUSE SHOULD BE CARRIED OUT. (TC NR 20070817002)