What was found
(CAN) M/R BLADE FOUND WITH CHORDWISE CRACK AT STA 90.0 DURING ROUTINE 100 HOUR INSPECTION.PILOT THOUGHT HE FELT A SLIGHT CHANGE IN AIRCRAFT VIBRATION LEVELS DURING FLIGHT TO MAINTENANCE FACILITY. THE CRACKEXTENDED 4 INCHES FROM THE TRAILING EDGE OFTHE BLADE SKIN TOWARD THE CENTER OF THE BLADE.WE HAVE PICTURES OF THE BLADE THAT CAN BE EMAILED IF REQUIRED.YOU NEED TO CHANGE THE SIZE OF THE MODEL/PN BOX TO ACCOMODATE LARGER PART NUMBERS. THE RIN COUNT ON THIS BLADE WAS 515,664 AT THE TIME OF REMOVAL.