Abstract: The current aircraft inlet pipe leakage monitoring system primarily employs eutectic salt electric superheat detectors as temperature sensing units. A linear array optical fiber sensor probe was investigated for detecting leaks in the aircraft inlet pipe, aiming to overcome the existing technical bottlenecks of the system such as poor electromagnetic compatibility, low measurement accuracy, and slow response time. The fiber grating array parameter design and package structure design were carried out by mathematical modeling and simulation methods, and experimental verification and mathematical analysis were carried out. The research demonstrates that the sensor probe has a certain strain immunity and vibration resistance ability with a temperature sensing accuracy of 0.1 m and positioning accuracy of 1.0 m. A temperature measurement accuracy within ±3 ℃ over a working temperature range from 0 ℃~180 ℃ was achieved. The results of this study provide a new idea for remote distributed and lightweight aircraft bleed air leakage temperature measurement instead of eutectic salt leak detection sensors.