Avionics FAQs

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Avionics FAQ

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What type of battery maintenance do the PS-855 series power supplies require?

According to L3 Service Letter SL-170 (Rev. K), the condition of the batteries is required to be checked every 3 to 6 months according to the Periodic Check procedure outlined in the bulletin. The Periodic Check procedure is similar to the "Preflight Check" that is recommended before aircraft flight.