What was found
CABIN ODOR: WHEN APU IS RUNNING AND PACKS ARE SELECTED ON THE CABIN AND COCKPIT SMELL LIKE DIRTY CLOTH. THE SMELL GOES AWAY AT ALTITUDE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CABIN ODOR: WHEN APU IS RUNNING AND PACKS ARE SELECTED ON THE CABIN AND COCKPIT SMELL LIKE DIRTY CLOTH. THE SMELL GOES AWAY AT ALTITUDE.