"THIS IS A FRONT FAN DUCT BUSHING SLEEVE (AMS 5744 SST, 0.251 INCH DIAMETER 0.225 INCH HIGH) USED ON THE 220 ENGINE. OPERATING HARDWARE HANGS FROM THIS BOSS AT THE 6OCLOCK POSITION. RELEASE OF THIS HARDWARE WOULD SHUTDOWN POWERPRODUCTION AND POWER TRANSMISSION TO THE AIRCRAFT RESULTING IN ABORT OF MISSION AND EXTENSIVE MAINTENANCE BURDEN."