As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: LEFT AFT SERVICE DOOR INDICATOR LIGHT EICAS SHOWED OPEN.HANDLE INSIDE DRIFTS UP POSITION.LIGHT OUT WHILE WEIGHT IS APPLIED TO HANDLE.UNEVENTFUL.MAINTENANCE FOUND STOP PINS OUT OF ADJUSTMENT AND PROPERLY ADJUSTED THE STOP PINS. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.