Electrical power
TTP B1-L3 ATA24 Cessna 172 B2-L3 Electrical energy is supplied by a 28-volt, direct current, single primary bus, negative ground electrical system. A single 24-volt main battery supplies power to the starting system and gives a reserve source of power if an alternator failure were to occur. Garmin G1000 system have a second battery known as the Standby Battery. Standby Battery is controlled and monitored by the Standby Battery Controller and supplies power to the G1000 Essential Bus if there is a failure of the main battery and alternator. Power junction box, (MCU), is attached to the forward left side of the firewall and includes electrical relays, an alternator control unit (ACU), an ammeter sensor, an external power receptacle, fuses and/or circuit breakers in a single box. Engine-driven alternator is the normal source of power during flight and maintains...