3M Aerospace’s 900AST locates and analyzes avionics wiring problems resulting from vibration, moisture, and age. The handheld, integrated tester is designed to reduce downtime and minimize aircraft-on-ground expenses. With the tester, technicians can locate faults including opens, shorts, and intermittents in the wiring of various aircraft including military, commercial, and private. In addition, the tester supports a range of individual tests to categorize and sectionalize potential problems. A key benefit is the tester’s ability to display the distance to a fault in inches. Features include an IR port for uploading measurements to a PC; a large, backlit LCD display; a user-friendly, icon-based graphical user interface; and built-in internal help menus.