As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#70FLL-BOS. 'UPON AIRCRAFT DROPPING GROUND POWER ONLY AFT CABIN CEILING LIGHT ILLUMINATED; REF. L/P PAGES 3526363, 3526364, 3526365 ITEMS #1 AND #2 FOR REMOVAL OF ALL SIX EPSU BATTERIES. OP'S CHECK IS OK AT THIS TIME. ALL IAW AMM 33-51-38-400-002-A.'REMOVED AND REPLACED EPSU BATTERY AT 11WL IAW AMM 33-51-38. OP'S CHECK OK.'