What was found
THE AIRCRAFT WAS ON A MAINTENANCE FLIGHT FOR ROUTINE TRACKING AND BALANCING FOLLOWING A MAIN ROTOR BLADE REPLACEMENT. THE NR 2 ENGINE OIL TEMPERATURE WAS OBSERVED TO BE APPROXIMATELY 15 DEGREES HIGHER THAN THE NR 1 ENGINE OIL TEMPERATURE. ALL OTHER ENGINE PARAMETERS WERE NORMAL. THE NR 2 ENGINE WAS OBSERVED BY ANOTHER AC TO BE EMITTING AN UNUSUAL AMOUNT OF SMOKE. A PRECAUTIONARY LANDING WAS MADE AND THE NR 2 ENGINE WAS SECURED. INSPECTION OF THE NR 2 ENGINE REVEALED A FAILURE OF THE 1ST STAGE NOZZLE SHIELD DOME ASSY (PN 23073533. THIS IS A KNOWN PROBLEM WHICH MFG HAS ADDRESSED WITH SB CEB-A-1370. THE CEB APPLIES TO EARLIER PN, BUT IS NOT APPLICABLE TO (PN 23073533). THIS FAILURE IS EXACTLY THE ANOMALY W