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Term Definition
External Power

A device that is used to supply electrical power via a cable and plug to the airframe external power receptacle. External power is used to prevent the aircraft batteries from being discharged during maintenance or often used for electrical power during engine starting. Some airframe external power electrical systems are designed to bypass the battery buss to prevent the batteries from being overcharged. To prevent the batteries from being overcharged, we recommend that the batteries be disconnected if the airframe external power electrical system design does not bypass the battery buss when external power is on in excess of four hours. External power should not be set higher than 2.38 volts per cell, 14.2 for 12 volt batteries and 28.5 DCV for 24 volt batteries.

 

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