What was found
AIRCRAFT WAS GROUNDED: EMERGENCY LIGHT TEST FAILED EPSU COMM AFT L MESSAGE SHOWN. **SUPPLEMENTAL REPORT WILL BE SUBMITTED ** (OPEN)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: EMERGENCY LIGHT TEST FAILED EPSU COMM AFT L MESSAGE SHOWN. **SUPPLEMENTAL REPORT WILL BE SUBMITTED ** (OPEN)