As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURNG OPS TEST OF EMERGENCY LIGHT, NOTED LTS FOR BATTERY PACK #1 PS35 DID NOT ILLUMINATE. REF NRWC 691188 CONT CARD DISC #18. R & R EPSU BATTERY PACK #1 (PS35) AND EPSU CHARGER ASSY (PS35) IAW AMM 35-17-400-801 & AMM 33-51-17-400-802. OPS TEST OK P/N:2013-1ASMI; S/N 11453 ON P/N: AD2013-1A; S/N 85518 OFF BATTERY PACK. P/N: OFF/ON 11-0049 S/N 27241 ON S/N 22337 OFF.