What was found
AIRCRAFT IN BASE MAINTENANCE. WHILE PERFORMING INSPECTION PER TASK CARD 26T22053004, DETECTED CRACK ON INTERCOSTAL FITTING ATTACHED TO FORWARD SIDE OF L1 DOOR STOP FITTING AT FR 16, LOWER INBOARD HOLE, 1/2 INCH FROM AFT END OF HOLE. REPLACED INTERCOSTAL FITTING PER EA 275345.