As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING TASK CARD 78233001 TEST FAILED EMERGENCY LIGHTS AFT ROW 23 TURNED OFF @ 11 MINUTES. EMER LIGHTS FWD ROW 23 TURNED OFF @ 14 MIN 30 SES. EXTERIOR LIGHTS AFT RIGHTHAND EMERG DOOR OFF @ 14 MIN. EMER EXTERIOR LEFT HAND OFF @ 14 MIN. GROUNDED - YES. REPLACED EMERGENCY LT BATTERY PACKS M1670, M1671, M1672, M1673. OP CHK GOOD. REF AMM 33-50-01.