As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFT LEFT ENTRY DOOR IS UNABLE TO ARM. FLIGHT ATTENDANTS ARE AFRAID IT WILL PULL THE EMERGENCY SLIDE OUT WHEN PULLING THE ARMING SLIDE INTO THE FLOOR BRACKET. UPON INSPECTION FOUND BALL ARM ON SLIDE NOT INSERTED INTO MOUNTON DOOR. MAINTENANCE REINSTALLED SLIDE PER APPLICABLE STEPS ON WORK CARD 08L22125001.