As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR/EWR - FLT 3848 - ABNORMAL VIBRATION AND NOISE COMING FROM RIGHT ENGINE DURING FEATHER AND UNFEATHER. NO NOISE WITH PROP BRAKE ON. BORESCOPE INSPECTION FOUND 1ST STAGE POWER TURBINE MISSING A BLADE. MAINTENANCE REMOVED AND REPLACED RIGHT ENGINE. OPS CHECKED GOOD. RETURNED TO SERVICE 6-2-95. (X)