Maintenance and Modifications
True Blue Seeking STC for Caravan Lithium-ion Battery
The Caravan STC is the first publically announced application for the TB44 main-ship lithium-ion battery.

The True Blue Power division of Wichita-based Mid-Continent Instrument submitted an application for STC approval to install its TB44 lithium-ion main-ship battery in all Cessna Caravan 208s and 208Bs. It expects to receive the STC in the fourth quarter, though it secured FAA and EASA technical standard order approval for the battery in  October.