What was found
L-1 DOOR EXTERIOR SKIN, UPPER HINGE CUT OUT AREA OF THE DOOR, PREVIOUS DOUBLER ON THE LOWER EDGE APPEARS TO HAVE A HAIR LINE CRACK INDICATION VISUAL INSPECTION. REMOVED CRACKED DOUBLER, FOUND DOOR SKIN WITH 1/2" CRACK AT UPPER HINGE CUT OUT LOWER AFT CORNER, STOP DRILLED CRACK DEBUR AND POLISHED AREA. FABRICATED NEW DOUBLER FROM 2024-T3 0.63, COUNTER DRILLED, TRIMMED, COUNTER SUNK AND BORED NEW DOUBLER IAW BOEING DRAWING NR 65B07563 AND 747 SRM 51-10-01.