As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN LANDING GEAR LOWERED EMERGENCY EXIT LIGHTS AT BOTH FORWARD CABIN DOORS CAME ON MOMENTARILY THEN WENT OUT AND REMAINED OFF. EMERGENCY LIGHTS ABOVE AISLE JUST AFT OF FORWARD GALLEY ALSO OUT. TROUBLESHOT TO PSU (10WL). R & R PSU. OPS CHECK NORMAL.