What was found
(CAN) DURING ANNUAL M/R BLADE INSPECTION AME DISCOVERED A SMALL CORROSION PIT IN BLADESKIN LOCATED AT BLADE STATION 13.7 & 5.5 FROM LEADING EDGE.(SEE ATTACHED PHO TOS)FOUR CRACKS WERE FOUND ORIGINATING FROM THE PIT.THE LONGEST CRACK WAS 14 INCH CHORDWISE, TWO SMALLER CRACKS PROGRESSING TOWARDS THE LEADING EDGE AT APPROXIMATELY 45 DEG FROM THE MAIN CRACK.THE FOURTH CRACK WAS PROGRESSING STRAIGHT TOWARDS THE LEADING EDGE. THE PIT WAS APPROXIMATELY 1/16 IN DIAMETER AND APPROXIMATELY 0.015 DEEP. M/R BLADE WAS REPLACED AND A/C RETURNED TO SERVICE.