What was found
ACFT DIVERTED WITH EICAS MESSAGE FWD EQ SMOKE DETECTOR STATUS PAGE. ALSO, HAD EQUIP OVERHEAT LIGHT ON. OVERBOARD EXHAUST VALVE OPEN. WENT TO ALTERNATE EQ COOLING OVERHEAT. RESOLVED AND A FEW MINUTES LATER SMOKE/OVERHEAT LIGHT CAME BACK OK. ALSO, PILOT REPORTED F/O VHF COMM RADIO INOP. TESTED ALL SYS AND FANS, ALL OK. FOUND F/O VHF TRANSCVR INOP AND FAILED BITE. ALSO, HAD WHAT APPEARED AS LIGHT SMOKE RESIDUE AT AIR VENT HOLES. REPLACED TRANSCVR RADIO SYS AND OVER HEAT SYS ALL CK NORMAL (P/N 39080001) (S/N 2651) OFF.