As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS IN BASE MAINTENANCE. AFT CABIN AISLE LT AND RT OVERHEAD CEILING MASTER CALL LIGHT/EXIT SIGN INOPERABLE. DOOR 4R FIVE EACH EXIT SIGN AND 1 CEILING LIGHT INOP AND 1 EMERGENCY LIGHT EXIT SIGN AT LAV 4F-L AND DOOR 4L INOPERABLE. REPLACED EMERGENCY POWER SUPPLY M33408 PER AMM 33-51-06-960-803. TEST OK.