As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS STRONG SMELL OF ELECTRICAL BURNING IN COCKPIT. MAINTENANCE TROUBLESHOT IAW CARD 26L00021001. FOUND GAPCU 24XG INOP WITH BURNED ELECTRICAL SMELL. REMOVED AND REPLACED GAPCU IAW AMM 24-41-34. OPS CHECK GOOD.