What was found
FLIGHT DECK PERSONNEL REPORTED EN ROUTE, RIGHT AC CROSSTIE LOCK OUT LIGHT ILLUMINATED. RIGHT AC ELECTRICAL FAILURE, PER QRH CONTINUED, APPROXIMATELY 20 MINUTES LATER, RIGHT ENGINE FIRE INDICATION, PER QRH SECURED RIGHT ENGINE AND LANDED AT NEAREST SUITABLE AIRPORT. EMERGENCY EVACUATION. MAINTENANCE DEPARTMENT PERSONNEL REMOVED AND REPLACED THE RIGHT ENGINE IAW ALLEGIANT AIR TASK CARD R0807101. AIRCRAFT RETURNED TO SERVICE.