As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. FLIGHT ATTENDANTS REPORTED BURNING SOCK ODOR STARTING ON DESCENT. FOUND APU TURBINE BEARING CAVITY LUBRICATION LINE O RINGS LEAKING & REPLACED THEM IAW 49-91-53. A SATISFACTORY LEAK & OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODOR BEING NOTED.