As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TEST OF EMERGENCY EXIT LIGHTS, THE LIGHTS ABOVE THE R-1 DOOR AND COCKPIT DOOR COME ON DIM FOR A FEW SECONDS AND THEN GO OUT. VERIFIED BATTERY DISCHARGED. HAD GOOD POWER, 28VDC, AT PIN 2 ON C/P D66 FOR CHARGER. SUSPECT BAD CHARGER. R & R CHARGER AND BATTERY PACK IAW AMM P TO F SUPPLEMENT 33-51-07. ALL OPS TEST GOOD.