2-7-12. Transmission Chip Detectors Fuzz Burn- Off

TM 1-1520-240-10 2-7-4 2-7-12. Transmission Chip Detectors Fuzz Burn- Off. Helicopters equipped with the chip detector fuzz burn-off system in the forward, combining (mix), aft, No.1 and No. 2 engine transmission, and aft rotor shaft thrust bearing are identified by a module labeled PWR MDL CHIP BURN-OFF located below the MAINTENANCE PANEL. The chip detector fuzz burn-off system employs an oper- ated fuzz burn-off electrical circuit with the ability to elimi- nate nuisance automatically chip lights caused by minute ferrous metallic fuzz or ferrous metallic particles on the transmission chip detectors. The response time of the fuzz burn-off circuit is more rapid than that of the helicop- ter warning system; thus a successful fuzz burn-off will be accomplished before any caution capsule on the mas- ter caution panel illuminates. Should the particle or par- ticles not burn off, the XMSN CHIP DET caution will illu- minate. Also, the corresponding TRANSMISSION CHIP DETECTOR or ENGINE CHIP DETECTOR magnetic indicator on the MAINTENANCE PANEL will latch. Pow- er for the PWR MDL CHIP BURN-OFF is supplied by the No. 1 DC bus through the HYDRAULICS MAINT PNL circuit breaker on the No. 1 PDP.