As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - A STRONG ODOR OF OLD SOCKS WAS COMING FROM THE AIR CONDITIONING SYSTEM, ESPECIALLY AT LOW ENGINE POWER SETTINGS. SUSPECT FILTERS NEED CHANGED. MAINTENANCE COMPLIED WITH TROUBLESHOOTING CARD 03L00021001. REMOVED AND REPLACED RIGHT AIR CYCLE MACHINE ALONG WITH RIGHT COALESCER BAG. OPERATIONAL CHECK AND LEAK CHECK GOOD.