As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE CHG DUE TO TOWER SHAFT-GEARBOX MATING SURFACE OIL LEAK. ENGINE DOWN FOUND. WILL NEED SEALS AND PLUGS PRIOR TO FLT HAVE ACCESS TO INSTALL PARTS ONCE ENGINE IS UP. REMOVE AND INSTALL ENGINES REF MT71-017. REPLACED NR 2 ENG IAW MT71- 017. ACCOMPLISHED INSP OF PYLON AND ENGINE. NO LEAKS FOUND. OPS CHECKS GOOD.