Importance

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Abstract

The present disclosure relates to lubrication systems for a jet aircraft engine. The system includes an oil tank with a high level sensor and a unit for monitoring the level of oil in a lubricating system. The monitoring unit includes a first input for a high oil level oil level signal, and a second input for a signal that the engine is running, and an output capable of generating an alarm signal. The monitoring unit is configured to generate an overfilling alarm signal, provided that the engine is running and the oil level is equal to or greater than the high level over a given period. This double condition avoids false positives, especially for engines subject to the phenomenon of “gulping”. For these engines the oil level in normal operation is significantly lower than when stopped. These measures can thus provide a reliable means of detecting overfilling.

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First Claim