What was found
FLT#223, JFK-LAX. (AIRCRAFT DECLARED AN EMERGENCY AND DIVERTED TO CMH) 'CRUISING 36000 SMOKE AFT AVIONICS COMPARTMENT ALARM WENT OFF. FOLLOWED QRH SMOKE INDICATION STAYED ON FOR 10 - 15 MINUTES .WENT OFF ON SHORT FINAL . ( LIVE TV4 (SYSTEM/ ALL) ); REFER TO 3724432-2, OPS CHECK OK IAW AMM 44-20-19. MX-4 UPDATED. PLACARD REMOVED, MDDR CLEARD. R/S 8THR732B.'