What was found
RT HORIZONTAL LOWER SKIN IS CRACKED AT REAR SPAR, BS 118. ACFT GROUNDED. ON DEFERRAL. REPAIRED RT HORIZONTAL LOWER SKIN CRACK AT REAR SPAR, BS 118 IAW SRM 55-10-01-2R-13. THIS IS A CATEGORY B REPAIR THIS CAT BN REPAIR HAS FAA APPROVAL IF YOU DO THE SUPPLEMENTAL INSPECTIONS AS GIVEN IN PARA 5 OF REPAIR SRM 55 10 01, 2R, B REPAIR 13 AT INTERVALS EQUAL TO OR LESS THAN 12 MONTHS AFTER YOU INSTALL THE REPAIR. REPAIR INSTALL 07JAN16.