As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERGENCY LIGHTS FLASHING IN ARM POSITION. // SIGNOFF// GAINED ACCESS TO FWD EMERGENCY BATTERY BY REMOVING FLOOR PANEL 223CLF. REMOVED INOP EMERGENCY BATTERY P/N 6450LS-00 S/N 001876 AND INSTALLED NEW CUSTOMER SUPPLIED EMERGENCY BATTERY P/N 7450LS-00 S/N 006285. FUNCTIONAL CHECK IS GOOD WITH NO DEFECT NOTED. DONE AT KPBI. WORK DONE PER PHENOM 300 AMM 33-52-00-710-801.