What was found
LCQ - MAJOR REPAIR - DURING C-15 CHECK 3 EACH .300" CRACKS WERE FOUND ON LOWER AFT RADIUS RIVET PATTERN OF R1 DOOR CUTOUT. MAINTENANCE CUTOUT CRACKED AREA OF SKIN, PERFORMED HFEC INSPECTION TO VERIFY CRACKS WERE CONTAINED, FABRICATED 2 EACH REPAIR DOUBLERS AND INSTALLED REPAIR PARTS AT R1 DOOR LOWER AFT CORNER IAW B737-300 SRM 53-10-01, FIG. 202, PG. 204-208.