What was found
ON APPROACH TO LAND AT KAPA PILOTS SELECTED FLAPS DOWN, AND FLAP SYSTEM DID NOT RESPOND. PILOTS RECEIVED A CAS MASSAGE "FLAP FAIL". CREW FOLLOWED FOM AND PROCEEDED TO MAKE AN UNEVENTFUL NO FLAPS LANDING. AN EMBRAER AOG MAINTENANCE TEAM WAS DISPATCHED TO TROUBLESHOOT THE FLAP SYSTEM MALFUNCTION AND THEY DETERMINED THE FLAP PDU POWER DRIVE UNIT. THE PDU WAS REPLACED, FLAP SYSTEM RIGGED AND OPERATIONALLY CHECKED. AIRCRAFT WAS RETURNED TO SERVICE WITH NO FURTHER REOCCURRENCES ON SEVERAL SUBSEQUENT FLIGHTS TO DATE.