As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER TAKE OFF, DURING CLIMB A DIRTY / MUSTY ODOR IN THE FRONT AND REAR OF THE AIRCRAFT WAS REPORTED. THE AIRCRAFT RETURNED TO CLT WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. NOTE: NO EMERGENCY WAS DECLARED. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. (OPEN)