What was found
AIRCRAFT WAS IN BASE MAINTENANCE. CRACK INDICATION ON PASSENGER CREW DOOR IN OPEN FASTENER HOLE INBOARD UPPER POSITION (HOLE 1) AT LEVEL OF STRINGER 10L, FRAME 16, DOOR STOP NR 7. REMOVED AND REPLACED INTERCOSTAL FITTING PER SRM 51-72-11 AND DRAWING D53112300.