What type of metal is detected by the chip detectors?

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Chip detectors are designed specifically to detect ferrous metal particles. These detectors utilize a magnetic field to attract and capture any ferrous debris that may be present in the oil or lubrication system of an aircraft. Ferrous materials, which contain iron, are particularly significant in this context because their presence can indicate wear or damage to key engine components or gearboxes.

The functionality of chip detectors is critical for ensuring the reliability and safety of helicopter systems. When a chip is detected, it can prompt maintenance personnel to investigate further, potentially preventing more severe damage or failure. The other materials listed, such as non-ferrous metals, aluminum, and metal composites, are not typically attracted to a magnetic field and generally wouldn't be detected by these systems in the same way that ferrous materials can be. Thus, the ability of chip detectors to identify ferrous particles is essential for monitoring the health of the helicopter’s mechanical systems.