As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED WHILE PASSING 12000 IN DESCENT, WITH ENGINES IDLE 300 KNOTS A STRONG OILY/DIRTYSOCK SMELL OCCURED. MAINTENANCE FOUND THE APU LEAKING OIL AT THE V-BAND SEAL AND REPLACED THE APU PER TASK CARD 26L31049003. ** (CLOSED)