What was found
AFTER REMOVING SEAT TRACK AT STATION 1320 - 1520 RBL 45 FOR C CHECK, A DAMAGED HOLE WAS FOUND. AFTER REMOVING FASTENER, 5/16 INCHES IN DIAMETER, FUSELAGE MAINFRAME SECTION 46, ELONGATED HOLE REPAIR STATION 1320 RBL 45.50. REPAIR ACCOMPLISHED ON STAM EA 757-5365-16 - F4354. COMPLIED WITH EA F-5310-T0304409.