ATA 32

Anti-Skid System Transducer Drive Cap Gap

Every maintenance technician knows the important part the wheel speed transducers play in the brake anti-skid system operation. Many of us don't give much thought to the drive cap, but the system manufacturer indicates the gap of the spring drive clip is critical for proper low-speed anti-skid function.The proper gap of the spring drive clip mounted inside the 1124 main wheel dust cap is 0.140 in. +/- 0.010in. Technicians should be sure to check the condition of the clip and its gap at each removal and installation ofthe dust cap. Excessive clip gap may cause the anti-skid system to process false signals from the wheel speed transducers and command full-release of the brakes at speeds between 10-20 knots. The inspection criteria arein the 1124 Maintenance Manual, Chapter 32-44-06.