Engine health and condition monitoring

Engine monitoring units provide the most advanced insight into engine health ever achieved. They allow operators to optimise the maintenance and performance of engines, increasing engine efficiency.

Achieve the most advanced insight into engine health possible – with an EMU

Installed in the aircraft electronic bay, or more recently on an engine, engine monitoring systems (also referred to as engine health monitoring systems or engine condition monitoring systems) are ideal for:

  • optimising the maintenance and performance of engines
  • increasing engine efficiency and time on the wing
  • reducing noise in the cabin.

The core of an engine monitoring system is the engine monitoring unit (EMU). This provides the flight crew and maintenance staff with the most advanced insight into engine health ever achieved. It fulfills all the traditional vibration monitoring tasks, while acquiring additional data to support health management. The result is increased engine availability and reliability – and reduced maintenance costs.

How the EMU works

The EMU acquires and processes the signals from various engine monitoring sensors including vibration, pressure (static and dynamic), temperature, strain, rotation speed, position, displacement, fuel flow, oil debris and oil level. It also communications via digital bus with the engine control from a FADEC or diverse aircraft systems. The EMU records engine usage, additional data related to the events, and anomalies or exceedances to support maintenance management using condition monitoring techniques.

The more affordable, lightweight choice

The latest addition to our EMU range is the family of AGILE units. These provide similar functionality to bigger EMUs, including smart condition monitoring. They are, however, lighter and more affordable. AGILE monitoring units are ideal for practically all markets. You can use their monitoring functions for smaller assets, including auxiliary power units, air cycle machines, generators, gearboxes, and more.

Working with you on engine health monitoring systems

The optimisation of sensing and processing is essential for engine health and condition management systems. We work hand-in-hand with engine and aircraft OEMs to tailor cost-effective solutions to each individual application. Our health monitoring systems are based on 60 years’ experience gained in other high-tech domains, where our organisation is also a pioneer and a leader.

Features and benefits

Our EMUs offer you all these and many more:

  • Additional sensor inputs, including pressure, temperature, strain, rotation speed, position, displacement, fuel flow, oil debris, oil level
  • Engine vibration monitoring/cockpit data and alerts
  • Cold fan trim balancing computation
  • Recording of related parameters in the case of pre-defined “events” or “exceedances”
  • Diagnostics and prognostics algorithms capability
  • Harsh environment capability for engine-mounted versions
  • Lowers the maintenance cost and enables condition-based maintenance (CBM).


Our engine monitoring systems are widely used and installed either in the electronic bay of the aircraft or mounted on the engine.

  • Engine interface and vibration monitoring unit (EIVMU) designed specifically for civil wide-body aircraft
  • Central maintenance computer (CMC) optimised for the regional aircraft
  • Generic engine monitoring unit (GEMU) used for civil narrow-body aircraft
  • Engine interface and control unit (EICU) developed for civil narrow- and wide-body aircraft
  • Engine interface and power management unit (EIPM) developed for the wide-body aircraft
  • Engine monitoring unit (EMU) is a family of engine-mounted health monitoring systems used for the latest generation of engines for wide-body aircraft

At Meggitt, we can provide you with a sensing and monitoring solution that is specific to your aerospace application and can be further customised to your particular requirements. To discuss what you need in more detail, please contact us.

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