What was found
UPON THE DAILY INSPECTION, A COIN TAP TEST WAS PERFORMED ON THE TAIL ROTOR BLADES. TAIL ROTOR BLADE, PN 500P3100-105, SN C519 WAS DISCOVERED TO BE DELAMINATED. THE DELAMINATION CONSISTS OF A 1.5 INCH AREA OF THE LE ABRASION STRIP ON THE OTBD SIDE OF THE BLADE .5 INCHES FROM THE TIP. THE BLADE HAD ACCUMULATED 275.4 FLIGHT HOURS SINCE IT WAS INSPECTED, REPAIRED & HAD THE LE ABRASION STRIP REPLACED. THE PROBABLE CAUSE OF THE DELAMINATION IS IN PROPER MIXING OF THE ABRASION STRIP BONDING ADHESIVE, IMPROPER CURING OF THE BONDING ADHESIVE, OR IMPROPER CONTOURING OF THE LE ABRASION STRIP, BENT AT THE WRONG DEGREE. TO PREVENT RECURRENCE OF DELAMINATION TO THE LE ABRASION STRIP, THE BONDING ADHESIVE WAS MIXED & CURED PROPERLY & THAT THE LE ABRASION STRIP WAS BENT TO THE CORRECT ANGLE.