As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A NR 1 PACK RUMBLES AND HAS BAD ODOR SMELL. TURNED OFF PACK NR 1 AND ODOR RUMBLE CLEARED. PERFORMED RTS ON NR 1 ACC WITH ALL PASS. NO RUMBLE NOTICED. RAN PACK NR 1 ON GROUND FOR 45 MINUTES WITH NO ODOR/SMELL NOTICED BY BOTH MECHANICS. A/C IS OK FOR SERVICE.