As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING TSR71285 FOUND LABYRINTH SEAL TEETH ON CENTER VENT TUBE REAR OF EXTENSION DUCT DIAMETER TO BE OUT OF LIMITS AT MEASUREMENTS OF 2.061", 2.050 AND 2.073" AND AFT OIL SEPARATOR HOLE ELONGATED ON #2 ENGINE. GROUNDED - YES. ENGINE REPLACED PER W/O 1915202. TRANSFERRED TO SHOP W/O FOR #2 ENGINE S/N 892740.