As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: REF MIC 7102462. AN ATTEMPT WAS MADE TO PLACARD PROGRAM AND TESTPANEL MEL 23-26 BUT M PROCEDURE D. 23-73-00-040-007-A B.PROCEDURE (1) 33-51-00-040-001-A 4.PROCEDURE A STEP 2 FAILED. ALL EMERGENCY LIGHTS DID NOT ILLUMINATE.