As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS REMAINED ON FOR THE ENTIRE FLIGHT. OFF SWITCH IN COCKPIT HAD NO EFFECT. GROUNDED - YES. PERFORMED BITE TEST OF CIDS AND EPSU SYSTEMS BITE TEST OK. PERFORMED FAULT ISOLATION TEST IAW AMM 33-51-00-810-803-A. OPS TEST PASSED. NO DEFECTS NOTED. SWITCH OPERATES LIGHTS NORMALLY. OK FOR SERVICE.