October 26, 2017: ATR, a Franco-Italian aircraft manufacturer, has certified its new Vibration Monitoring System (VMS) which will permit airlines to continuously monitor and fine tune propeller vibration. This innovation, which will be available on all new aircraft from March 2018, enhances both aircraft reliability and passenger comfort. It will also be available to retrofit on in service aircraft, via Service Bulletin.
The new VMS will be permanently installed on the aircraft and replaces the earlier temporary ground tooling systems used to monitor engine vibration. This equipment, which will be supplied by Meggitt Sensing Systems, removes the need for airlines to organise regular ground testing or put maintenance personnel on revenue flights, therefore improving maintenance efficiency.
VMS measures vibration at engine level in real time, through an acceleration sensor, or accelerometer, placed on each engine very close to the propeller. The vibration analysis performed throughout the flight within the Vibration Monitoring Control Unit will be stored for easy access after flight by Maintenance personnel through the MCDU (Multifunctional Control Display Unit). The resulting VMS report is then included in the Aircraft Condition Monitoring System, with precise directives to airline maintenance crews on how to balance the propellers.
Reducing propeller vibration boosts the comfort for everyone on board by minimising vibration and engine noise in the cabin. It also improves the reliability of engine components and of the aircraft as a whole, and ultimately reducing Direct Maintenance Costs.
Tom Anderson, senior vice-president Programs & Customer Services, ATR said, “This new VMS is yet another example of an innovation that ATR has developed which can effectively improve the efficiency of our customers’ maintenance operations. We are committed to continuously developing both our products and maintenance services solutions that we are able to offer to customers, allowing them to minimise the time their aircraft spends on the ground and ensure they maximise the revenues that they generate.”