What was found
(LOG 0191224) AFT CARGO BAY R/H Z CHANNEL IS DAMAGED IN SEVERAL AREAS FROM STA 727B-767, RBL 25, WL 156. FABRICATED AND INSTALLED REPLACEMENT R/H Z-CHANNEL SECTION FROM STA 727B TO 767 AND SPLICE REPAIR INSTALLED BETWEEN STA 727H TO 727I, RBL 25, WL 156 AT AFT CARGO PER B737 SRM 53-00-53-2R-6 AND B737 SRM 51-40-02-0G, DWG# 146A7500.