As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE WAS REPORTED TO EXHIBIT HP ROTOR SEIZURE ON START. INSPECTION REVEALED HP TURBINE SHROUD-TO-BLADE TIP RUB DUE TO SHROUD OXIDATION DAMAGE. INVESTIGATION ESTABLISHED THAT THE SHROUD ASSY FEATHER-SEALS HAD BEEN OMITTED AT PRODUCTION OF ASSY. A SB WILL BE ISSUED TO RECOMMEND INSP OF ENGINES WITH A POTENTIAL OF BEING SIMILARLY EFFECTED.