BC410 Standby Alternator System, Bonanza (STC-PMA)

The B&C Standby Alternator system continues to earn the acclaim of Bonanza owners for its ease of operation and dependability.  Factory-installed on A36 (2000-2005) and G36 (2005 to present) aircraft, the BC410 system is also STC-PMA approved for many earlier Bonanza models, from the J35 (1958) through late-model A36 and B36TC’s.  This system provides 20 amps of power to support continued flight in the event of primary alternator failure.  Once activated, it operates in the background, automatically signaling its operation to the pilot through a panel-mounted annunciator light (which also doubles as a standby alternator load monitor).

If the primary alternator fails in flight, the controller will sense the drop in system voltage and automatically activate the standby alternator.  If the current requirement is over 20 amps when the standby alternator is activated, the annunciator will flash.  Reducing the current usage to 20 amps or less will cause the annunciator to cease flashing and illuminate in a steady state.  The pilot may choose equipment needed for the given flight conditions by simply keeping the total load below the flashing point of the annunciator.  This will reserve battery energy for transient loads, (gear, flaps, landing lights, etc) during approach.  Loads may be beyond the flashing point of the annunciator for up to five minutes without damaging the standby alternator.

Bonanza aircraft equipped with electroluminescent switch panels (EL panels) will need to have the nomenclature on the lower left changed during installation to comply with FAR’s.  To facilitate an efficient installation, B&C also has new EL panels available, produced by the OEM manufacturer per our STC.  For 1984 and newer aircraft, see P/N 410-329; and for 1972 to 1983 aircraft, see P/N 410-337.

The BC410 installation kit for Bonanza aircraft includes a STBY ALT ON annunciator, two standard pull-type circuit breakers (1 amp and 5 amp), STBY ALT field toggle-type switch, alternator gasket, alternator field connector, current sensor, wire, terminals, clamps, placards for each panel-mounted device, miscellaneous hardware, installation instructions, and flight manual supplement.