What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND DIVERTED TO LAP DUE TO THE FLIGHT CREW REPORTING THAT ENGINE 1 DISPLAYED A FIRE INDICATION DURING A GO AROUND AFTER ABORTING A LANDING INTO SJD DUE TO VISIBLITY - THE FLIGHT CREW ACCOMPLISHED THRUST REDUCTION AND SHUTDOWN ENGINE 1 ALONG WITH THE FIRE QRH PROCEDURE WITHOUT ENGINE FIRE PUSH PUSHBUTTON OR DISCHARGING THE FIRE BOTTLES. THE FLIGHT CREW ALSO REPORTED THAT DURING DESCENT INTO LAP AN APU GENERATOR FAULT DISPLAYED WHICH THE FLIGHT CREW ATTEMPTED TO RESET BUT THE GENERATOR WAS NOT RECOVERED UNTIL AFTER SHUTDOWN ON THE GROUND - THE AIRCRAFT LANDED SAFELY AT LAP WITHOUT FURTHER INCIDENT.