As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 BATTERY WOULD NOT CHARGE WHEN THE NR 2 GENERATOR SELECTED TO ON. THE GENERATOR VOLTMETER INDICATED PROPER OUTPUT AND THERE WAS NO ASSOCIATED FAILURE INDICATION. CYCLING THE NR 2 GENERATOR WOULD RESOLVE PROBLEM. DETERMINED HIGH RESISTANCE PRESENT ON MAIN CONTACTS OF NR 2 GENERATOR CONTACTOR WHEN ENERGIZED CLOSED. REPLACED CONTACTOR.