- Recent Articles
King Air Battery Drain
September 2009
 |
Cable, Jerry - Accessory Tech Rep - Lincoln, NE (LNK). Aviation professional since 1991. Airframes: Astra, Challenger, Citation, Embraer, Falcon, Gulfstream, Hawker, Learjet, King Air, Global, Westwind Hydraulic equipment and pumps, Pneumatic valves, Wheel and Brake, Emergency Power Supplies, Electric Motors, Mechanical Actuators, Landing Gear and Accessory Components and Systems Specialist. Direct: 402.479.8112 |
Certain model King Airs are subject to the battery being discharged below minimum starting limit if the aircraft has been static for even a few days. The cause of this might be the cockpit blowers.
The blowers are directly connected to the hot bus so they can operate after the battery switch is turned off. This occurs by design so the blower can operate if the electric heat has been in use and has not had time to cool before the battery switch is turned off. This causes a low but constant drain on the battery.
Battery Drain Prevention
If the aircraft is going to remain static for a few days or more, the battery should be disconnected or monitored for discharge below minimum starting voltage. If the battery is below 23 volts, it should be charged. If the battery is below 20 volts, it should be removed and have a capacity test performed.
Please contact a Duncan Aviation King Air Tech Rep with questions about this or other avionics or accessory issues.
King Air Technical Support
|
Cable, Jerry - Accessory Tech Rep - Lincoln, NE (LNK). Aviation professional since 1991. Airframes: Astra, Challenger, Citation, Embraer, Falcon, Gulfstream, Hawker, Learjet, King Air, Global, Westwind Hydraulic equipment and pumps, Pneumatic valves, Wheel and Brake, Emergency Power Supplies, Electric Motors, Mechanical Actuators, Landing Gear and Accessory Components and Systems Specialist. Direct: 402.479.8112 |
 |
Campbell, Curt - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1975. Airframes: Challenger, Hawker, Learjet, King Air, Global Air Data Computer, Auto Pilot Systems, EFIS, Roll Modules, Mode Couplers and Selectors, Static Inverters, Servos, Spoiler System, Tool Calibration Lab, Flight Guidance Computer, Cabin Displays, and EFD Components and Systems Specialist. Direct: 402.479.4220 |
 |
Magnus, Dan - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1976. Airframes: Citation, Embraer, Gulfstream, Hawker, King Air ADF, Comms, Control Heads, CVR, DME Gables Control Heads, Receivers, Nav-Comm/Receivers, Radar Systems, GPS, GNS, Transponders and UNS Components and Systems Specialist. Direct: 402.479.4217 |
 |
Schultz, Gerry - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1965. Airframes: Hawker, King Air Instrumentation, Vertical and Directional Gyros, Airspeed Indicators, HSI, ADI, Encoders, Course Indicator, Rate Gyro, Directisyn, Vertisyn, RMI and Pitot Static Components and Systems Specialist. Direct: 402.479.4212 |
 |
Troyer, Larry - Avionics Tech Rep - Lincoln, NE (LNK). Aviation professional since 1982. Airframes: Astra, Falcon, Hawker, King Air, Westwind Air Data Computer, Auto Pilot Systems, EFIS, Roll Modules, Mode Couplers and Selectors, Static Inverters, Servos, Spoiler System, Cabin Displays, and EFD Components and Systems Specialist. Direct: 402.479.4219 |
( Return to top )
