As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRSHUTTLE - FLT 5240 - PHX-YUM - THE CREW REPORTED FUMES ENTERING THE CABIN FROM THE ENVIRO SYSTEM, BLEEDS WERE SELECTED OFF. THE AIRCRAFT LANDED IN PHX, NO EMERGENCY WAS DELCARED. MECHANICS INSPECTED THE AIRCRAFT, PERFORMED ENGINE RUNUP AND COULD NOT DUPLICATE THE DISCREPANCY. CONDENSATION IS SUSPECTED TO HAVE CAUSED THE FUMES. AIRCRAFT WAS RELEASED FOR SERVICE. (M)