As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW NOTICED A SLIGHT ELECTRICAL OR BURNED RUBBER ODOR. MX FOUND SOURCE OF THE ODOR TO BE POTABLE WATER AIR COMPRESSOR. MX DEACTIVATED COMPRESSOR AND PLACED IT ON MEL IAW 38100101G. COMPRESSOR AND PRESSURE SWITCH WILL BE REMOVED AND REPLACED AT NEXT AVAILABLE MX OPPORTUNITY.