Shockbox SB49-01-135RFDCU - KC-135R APU FDCU (Fire Detector Control Unit) Test Box

The Shockbox SB49-01-135RFDCU - KC-135R APU FDCU (Fire Detector Control Unit) Test Box is an aircraft-specific tester used to verify and troubleshoot the auxiliary power unit fire detector control unit on the KC-135R. Built to follow the original design concept, it packages the necessary switches, indicators, and interfaces in a protective carrying case so technicians can exercise the FDCU and confirm that it reacts appropriately to simulated fire detection inputs.

This test box gives military and special-mission maintenance organizations a dedicated means to confirm APU fire detection reliability before releasing the aircraft back to service. The same principles and layout also make it a useful reference for other large-transport or industrial fire detection control systems that need rigorous verification and documentation.

Key Features

• Fire Detector Control Unit (FDCU) test box for the KC-135R APU fire detection system.
• Used to exercise and verify APU fire detection logic and outputs under simulated conditions.
• Built to comply with the original FDCU test box design for reliable, repeatable results.
• Packaged in a rugged case to withstand military maintenance environments.
• Supports troubleshooting and scheduled verification of APU fire detection hardware.
• Also relevant for other high-reliability applications requiring thorough testing of fire detection controllers.