What was found
DURING DESCENT WE SELECTED ALL A/I SYSTEMS ON FOR ICING CONDITIONS. ALL SYSTEMS OPERATED NORMALLY. UPON EXITING ICING CONDITIONS AT FL270, SELECTED ALL A/I SYSTEMS OFF. ABOUT 3 MINUTES AFTER SELECTING ALL A/I OFF, WE RECEIVED A/I ENGINE HOT R. ACCOMPLISHED A/I ENGINE HOT QRH. THE A/I ENGINE HOT R MESSAGE DID NOT CLEAR UNTIL STEP 4, WHEN SELECTING LP ON THE RIGHT SIDE. CORRECTIVE ACTION: REMOVED #2 ENGINE INLET ANTI ICE VALVE PN: 9914521-6 SN: 1768 DUE TO WEAR AND REPLACED WITH OVERHAULED VALVE PN: 9914521-6 SN:1616. WORK PERFORMED IAW: CESSNA 680A AMM 30-20-05. LEAK AND OPS CHECK GOOD WITH NO FURTHER DEFECTS