As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS IN CABIN FLICKERED ON 1 TIME IN FLIGHT. PITOT STATIC HEAT, STALL WARNING VALVE HEAT AND ELEVATOR HORN HEAT WAS ON AT THE TIME. PRIOR TO MAINTENANCE DUPLICATED PROBLEM. COMPLIED WITH WC 33-50-06. OPS CHECKED GOOD OF EMERGENCY LIGHT BLOCKING DIODES. FOUND LOOSE WIRE AT 3351-K2. RE-SOLDERED WIRE TO RELAY BASE. R & R EMERGENCY LIGHTS CONTROL.