What was found
EMERGENCY LIGHTING: ALL EMERGENCY EXIT LIGHTS FLICHERING DURING FLIGHT. LIGHTS FLICKER WITH SWITCH IN ON AND ARMED POSITIONS. // SIGNOFF // TROUBLESHOT SYSTEM IAW P-300 WM CH 33-50-50-1 AND FOUND AFT EMERGENCY LIGHTS BATTERY TO BE FAULTY. REPLACED AFT EMERGENCY LIGHTS BATTERY PIN 6450LS-OO SIN 001057 WITH TESTED UNIT P/N 6450LS-00 S/N 002233 IAW P-300 AMM CH 33-52-01-400-801-A. PERFORMED EMERGENCY LIGHTS SYSTEM OPS CHECK IAW P-300 AMM CH 33-52-00-710-801-A W/ SATISFACTORY RESULTS.. • INSTALLED UNIT DATED 11-3-2021