What was found
REMOTE CB TRIPPED CYAN CAS MESSAGE. ILLUMINATED DURING DESCENT. MESSAGE WAS ACCOMPANIED BY ODOR OF ELECTRICAL SMOKE. OPENED AFT "J" BOX & FOUND CB HK005 TRIPPED. RESET BREAKER, POWERED AIRCRAFT. POWERED PASSENGER SAFETY SYSTEM. AFTER APPROX 10 MIN. CB HK005 TRIPPED. INSPECTED WIRING & FOUND DIODE BURNED ON RELAY BEHIND SWITCH PANEL FOR PASSENGER SAFETY SWITCH. REMOVED & REPLACED BAD DIODE. C/W SATISFACTORY OPERATIONAL CHECK OF THE PASSENGER WARNING SYSTEM. ALL EICAS INDICATIONS NORMAL. IAE MM 33-20-01.