What was found
EMERGENCY LIGHTING: LIGHTS OVER SEATS 2R , DF, AND AFT LAV OVERHEAD LIGHTS DO NOT ILLUMINATE WITH SWITCH TO EMER ON. ALL LIGHTS DO ILLUMINATE WHEN CABIN LIGHTS ARE SELECTED ON. // SIGNOFF// DUE TO PAST HISTORY OF FAULT MCC REQUESTS TO REPLACE BOTH EMERGENCY BATTERY POWER SUPPLY UNITS.GAINED ACCESS, REMOVED FWD POWER SUPPLY NEW UNIT P/N BR9767-001 S/N C1156 INSTALLED P/N BR9767·001 S/N C2322. REMOVED AFT EMERGENCY POWER SUPPLY P/ N BR9767·001 S/N C1141, INSTALLED NEW UNIT P /N BR9767-001 S/N C2329. RE-INSTALLED PREVIOUSLY REMOVED PANELS PERFORMED SATISFACTORY OPERATIONAL CHECKS NO DEFECTS NOTED RE-CHARGED BOTH POWER SUPPUES IAW CHALLENGER MODEL350 SRM CHAPTER 33-50-00 REV 1 DATED JULY 14 2015