As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. FLIGHT CREW REPORTS BOTH OVERWING SLIDE SQUIBS TEST INOPERATIVE. ACCOMPLISHED FIM 25-65-00 & FOUND EMER BATTERIES AT FAULT. R & R BATTERY ASSEMBLIES & CHARGER ASSEMBLIES AT LOCATIONS M961 & M962. PERFORMED OPERATIONAL CHECKS IAW MM 25-65-00. SYS CHECKED NORMAL. SEE ALSO AALA 20160514001, AALA 20160516016 & AALA 20160516017.