What was found
(EMERGENCY DECLARED) PASSING THRU 10,000 FT, RT WING OVERHEAT LIGHT ILLUMINATED WITH ANTI-ICE SWITCH IN (OFF) POSITION. REDUCED POWER ON RT ENGINE TO IDLE AND LIGHT DIDN’T EXTINGUISH. APPROX 5 MIN LATER WHILE ENROUTE TO LANDING, LIGHT DID EXTINGUISH. LANDED UNEVENTFULLY; AC DID NOT EXCEED MAX LANDING WEIGHT. CHECKED VOLTAGE AND OPERATION OF RT ANTI-ICE VALVE IN ALL POSITIONS. OPS CHECKS GOOD. CHECKED RT ENG PCB, NO DEFECTS NOTED. COMPLIED WITH OPERATIONAL CHECK OF ANTI-ICE SYS. OPS CHECKS GOOD IAW MM CHP 30-11-00