As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. MAIN CABIN L1 DOOR SLIDE ARM INDICATION DOES NOT STAY LIT. "SLIDE" INDICATION GOES OUT SHORTLY AFTER PRESSING ARM LEVER DOWN. MAINTENANCE REMOVED DEBRIS FROM AFT GIRT BAR FITTING L1 DOOR AND ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.