As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE VIBRATION ABOVE IDLE, ACRID SMELL IN CABIN. ENGINE WAS BORESCOPED WITH NO DISCREPANCY FOUND. MAINTENANCE FOUND BLEED AIR VALVE STICKING AND REPOSITIONED TWO (V) BAND CLAMPS.AIRCRAFT WAS DISPATCHED ON AN EVALUATION FLIGHT WITH NO FURTHER DISCREPANCIES.