As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - DURING MAINTENANCE CHECK, THE EXTERIOR OVERWING EMERGENCY EVACUATION LIGHTS WOULD NOT EXTINGUISH WHEN CONTROL SWITCH PLACED TO OFF POSITION, WOULD EXTINGUISH WHEN SWITCH PLACED TO ARMED POSITION. REPLACED THE POWER SUPPLY AND OPERATED NORMALLY. (M)