What device warns of metal chips or particles in the air-turbine starter oil?

• A. Oil pressure sensor.
• B. Vibration monitor.
• C. Magnetic chip detectors.
• D. Thermal switch.

Answer: (C)

Metal chips in starter oil signal internal wear, and the device that warns about them is a magnetic chip detector. It’s placed in the oil flow and uses a magnet to attract ferrous metal particles that come from gears, bearings, or other moving parts. When debris accumulates, the detector’s indicator or signal changes, giving maintenance a warning to inspect for potential wear or damage. Oil pressure sensors, vibration monitors, and thermal switches monitor different conditions (pressure, vibration, temperature) and do not specifically detect metal debris in the oil, so they aren’t the best choice for warning about chips.