Which chip detectors are equipped with a burn function?

• A. All chip detectors
• B. All but the AGB
• C. Only AGB detectors
• D. Only upper cell detectors

Answer: (B)

The correct choice indicates that all chip detectors, except for those located on the Accessory Gear Box (AGB), are equipped with a burn function. The burn function is a crucial feature that allows for the removal of accumulated metal particles in the chip detector, such as those resulting from wear and tear. By using a burn feature, these detectors can clear their sensors, ensuring continued operation without false alarms.

The rationale behind the AGB being excluded is that chip detectors in various systems often have different operational requirements. Specifically, the AGB is designed primarily for the propulsion system's auxiliary components, and its operating environment may not necessitate the same level of immediate self-cleaning as the main rotor or gearbox systems where wear debris could be more frequent and critical to detect.

Understanding these distinctions is vital for maintaining helicopter reliability and safety, as it ensures that operators are aware of the functions and limitations of the chip detectors throughout the helicopter's systems.