What was found
OUTER AIRCRAFT DOOR SKIN FAILED WITHOUT WARNING WITH A 2.5 INCH CRACK ORIGINATING AT END OF FORWARD SIDE OF DOOR HINGE AND EXTENDING UPWARDS. DISASSEMBLED DOOR AND FOUND THE FOLLOWING PARTS HAD FAILED: 46624-03 BRACKET (ON FORWARD LOWER SIDE) 466550-02 BULKHEAD (ON OUTER FLANGE ACROSS 2 RIVET HOLES) AND 46550-04 BULKHEAD (ON OUTER FLANGE ACROSS 2 RIVET HOLES). REPLACED ALL THREE SHEET METAL COMPONENTS, FABRICATED AND INSTALLED EXTERNAL DOUBLER OVER CRACKED AREA OF EXTERNAL DOOR SKIN IAW AC 43.13-1A AND 2A.