As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: STRONG DIRTY SOCK SMELL FROM AIR CONDIONING. REMOVED AND REPLACED LEFT ENGINE IAW MCM 71-94-50. FOUND SUMP A, B AND C CONTAMINATED WITH FERROUS METAL. REMOVED AND REPLACED LEFT ENGINE (S/N 907251) IAW MCM 71-94-50.