As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. FOUND COCKPIT OVERHEAD ELECTRONIC DEVICE SWITCH CAUSING EMERGENCY LIGHTS TO COME ON. TESTED EMERGENCY LIGHTS PER AMM 33-51-00-710-009-A. NO PED SWITCH FIN # 190RH MUST BE IN OFF POSITION IS A PRE REQUISITE FOR EMERGECNY EXIT LIGHTS TEST. NO FAULTS NOTED.