As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED RON CHECK, FOUND EMERGENCY EXIT LIGHT COULD NOT BE TURNED OFF WITH THE SWITCH IN THE AFT POSITION. THE ONLY POSITION THE LIGHTS COULD BE TURNED OFF WAS IN THE ARMED POSITION WITH OR WITHOUT GROUND POWER OR APU POWER ON THE A/C. PERFORMED OPS CK OF EMERGENCY LIGHTS SYS SEVERAL TIMES, OPS CK OK PER BOEING MM.