Where is the chip detector sensor located?

The chip detector sensor is correctly identified as being located in the reduction box. This sensor plays a critical role in monitoring the health of the system by detecting metal particles or chips in lubrication systems. If wear occurs in gears or bearings, small metal fragments can be generated, and the chip detector will sense these particles, indicating potential mechanical issues.

The reduction box is specifically designed to reduce the speed and increase the torque of the engine output, and since it contains moving parts subject to wear, it's essential to monitor it closely. The placement of the chip detector in this area allows for effective monitoring of the mechanical condition, as it helps prevent further damage by alerting maintenance personnel to the presence of harmful debris.

In contrast, the oil tank, fuel system, and engine compartment are not the typical locations for a chip detector. The oil tank primarily holds lubricating oil, the fuel system manages fuel delivery, and the engine compartment contains various components but does not typically serve as the monitoring point for metal debris specific to the reduction gear assembly. Therefore, the reduction box is the logical and most effective location for the chip detector sensor due to its operational context and the necessity for early detection of wear.