What was found
AFT CARGO BAY RIGHT HAND Z CHANNEL HAS MULTIPLE AREAS OF CORROSION STATION 727B-767, MARKED. CORROSION ON AFT CARGO BAY RT Z CHANNEL FOUND TO BE OUT OF LIMITS DUE TO PROXIMITY OF FASTENER HOLES, IAW SRM 53-00-53-1A-2 FIG 103 DETAIL D. REMOVED Z CHANNEL, IAW SRM 51-40-02-0G-0. INSTALLED FABRICATED Z CHANNEL, IAW SRM 51-40-02-0G-0 AND BOEING DWG 146A2500 REV C.