ENGINE INDICATION SYSTEMS

The precision with which parameters are displayed is important for a good engine monitoring by the crew.

The technician must determine if the problem announced by the crew is really a problem in the engine, or simply a problem of indication.

Indeed, the problem can be at the source of the signal: probe, sensor, detector or transmitter, or in the indicator, or between source and indicator when the signal passes through intermediate components (amplifier, etc).

Finally, a problem of wiring is always possible (bad connection, cut, etc...)

Only a methodical fault isolation can allow to quickly identify the origin of the problem pointed out by the pilot.

Electronic display systems reduce the crew workload thanks to the integration of automatic monitoring systems and alarm centralization. It is generally useful for the personnel of maintenance, when such systems comprise devices of automatic recording for the parameters which exceed the tolerance, so as to be analyzed after the flight; the maintenance engineer will then be able to know at which time a parameter exceeded the authorized maximum, for how long and what was the maximum value reached.

Electronic display systems are highly reliable and thus receive very few interventions of maintenance. This however, is not the case for probes, sensors, transmitters which are subjected to a hostile environment (pressure, temperature, vibrations) and may require necessary interventions by the personnel of maintenance.