As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: STRONG BURNING, ELECTRICAL ODOR COMING FROM GROUND PCA CONNECTOR. MAINTENANCE ACCOMPLISHED ODOR CARD 05-96-70 AND FOUND BAD DUCT IN RIGHT PACK BAY. MAINTENANCE REPLACED DUCT, AND PERFORMED SATISFACTORY OPERATIONAL CHECK.