What was found
(CAN) IT WAS REPORTED TO BELL:DURING BUCKETING OPERATIONS AT APPROX 300 FEET ABOVE GROUND LEVEL, THE PILOT OBSERVED THAT THE #2 ENGINE FIRE LIGHT HAD ILLUMINATED. HE PILOT FOLLOWED THE EMERGENCY PROCEDURES FOR AN ENGINE FIRE INDICATION AND SUBSEQUENTLY DISCHARGED BOTH FIRE RETARDANT BOTTLES. THE #2 ENGINE WAS SHUT DOWN AND A SUCCESSFUL SINGLE-ENGINE APPROACH AND LANDING WAS COMPETED. THE OPERATOR`S MAINTENANCE FOUND THAT A FIRE DETECTOR AMPLIFIER WAS UNSERVICEABLE. (TC# 20190622001)