What was found
AFW - FUSELAGE SKIN AT STATION 1809 RIGHT HAND UPPER FASTENER HOLE HAD A CRACK INDICATION IN THE FUSELAGE SKIN ONLY AT THE FOUR O`CLOCK POSITION. AREA IS .375 BY .375 AT THE RIGHT HAND FUSELAGE AFT AT STATION 1809. THE HOLE HAD BEEN REAMED TO 0.375 TO REMOVE CRACK INDICATION. OVERSIZED THE HOLE IN THE FUSELAGE OUTER SKIN TO 0.375 INCHES. VERIFIED CRACK WAS COMPLETELY REMOVED. INSTALLED A COUNTERSINK FREEZE PLUG IN SKIN. REINSTALLED EXTERNAL WEAR DOUBLER.