What was found
FLIGHT CREW REPORTED EXCESSIVE VIBRATION FROM LT ENGINE AREA FOLLOWING LANDING. NOTED EXCESSIVE BRUSH DUST AND DIRT, ETC. ON AND AROUND LT ENGINE STARTER/GENERATOR. REPLACED STARTER/GENERATOR, ENGINE VIBRATION NORMAL. DURING TEARDOWN OF REMOVED STARTER/GENERATOR FOR O/H, NOTED ANTI-DRIVE END BEARING BURNED, EVIDENCE OF SPINNING IN ANTI-DRIVE END BRUSH SUPPORT ASSY. END BELL HOUSING. INSTALLED BEARINGS APPEAR NON-STANDARD; MARKINGS SHOW MFG OUT OF COUNTRY, PN W6204RLD, ADDITIONAL MARKING OF "ZA12". DRIVE END BEARING THE SAME, EXCEPT WITH "ZA13" CODE MARKING. TRANSIENT ACFT.