As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON ARRIVAL AT PIT, AIRCRAFT BEGAN TO SMELL STRONGLY OF SOCKS / EXHAUST. ACCOMPLISHED SMOKE ODOR FUME JOB CARD 26L00021001. FOUND APU TO BE ODOR SOURCE. **SUPPLEMENTAL REPORT FOR AALA202203214127: APU INLET GUIDE VANE ACTUATOR LEAKING. REPLACED ACTUATOR PER AMM 49-23-51. LEAK AND OPERATIONAL CHECK GOOD. NO CABIN ODOR. ACCOMPLISHED ENVIRONMENTAL CONTROL SYSTEM DECONTAMINATION PER JOB CARD 2600021004.** (CLOSED)