As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEDICAL CREW REPORTED A BURNING SMELL IN THE AIRCRAFT CABIN DURING THE CRUISE PHASE OF FLIGHT. SUBSEQUENT INSPECTION BY MAINTENANCE STAFF NOTED 1 BURNT WIRE AT THE A1 TERMINAL OF AUXILIARY LIGHTING SYSTEM RELAY DUE TO IMPROPER WIRE GAUGE BEING USED AT SYSTEM INSTALLATION. IN RESPONSE TO THIS FINDING METRO AVIATION INC RELEASED AN INTERNAL MAINTENANCE MEMO TO INSPECT THE AIRCRAFT IN THEIR PART 135 FLEET TO MITIGATE FUTURE EVENTS.