As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) EMERGENCY LIGHTS TURN ON AND OFF RANDOMLY. / PERFORMED BITE TEST OF EPSU SYSTEM IAW AMM 33-51-00-710-001-A. FOUND EXTERIOR OVERWING EXIT LAMP INOP. REMOVED AND REPLACED OVERWING EXIT LAMP IAW AMM 33-51-15-000-001-A/400-001-A. OPS CHECK GOOD. EPSU SYSTEM TEST GOOD. COULD NOT DUPLICATE WRITE UP ON GROUND. A/C OK FOR SERVICE."