As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNCOMFORTABLE, AFFECT PILOTS-ATC COMMUNICATIONS TURNING R RECIRC FAN OFF PROVEN LITTLE HELP. RECIRC FAN IS OLD STYLE WITHOUT BAFFLE. PER SERVICE TIP OK TO DEFER FOR FAN REPLACEMENT. NEED FAN PCN 564-0211. REPLACED RIGHT RECIRC FAN, OPS CHECK GOOD.