Sperry Compass Coupler - Pn: 2591201-903 and similar items

Sperry Compass Coupler - PN: 2591201-903 PRE OWNED/ HAS A SMALL DENT CAVING IN ON ONE SIDE OF THE UNIT/ UNTESTED/ HAS A REPAIRED STICKER ON THE UNIT/ UNTESTED/ WE WERE TOLD THIS WAS PULLED FROM WORKINGE ENVIRONMENT BUT CANNOT TEST ANY FURTHER SO WE ARE SELLING AS IS Sperry part number 2591201-903 is a Sperry Flight Systems / Honeywell Sperry compass coupler used in aircraft heading/gyro systems as part of the automatic flight control and navigation suite. What it is A compass coupler is an avionics box that interfaces the aircraft?s magnetic/fluxgate compass and gyros to downstream users such as the autopilot, HSI/ADI, and other heading-dependent instruments.? The 2591201-xxx family are Sperry/Honeywell units; 2591201-903 is one dash-number variant within this series, functionally similar to other 2591201-9xx compass couplers used on various business jets and transport aircraft. Typical role in the system It takes raw heading/compass signals, performs compensation and stabilization, and outputs standardized heading and status signals for the flight director and autopilot.? These units are typically installed in the avionics bay and are matched to specific aircraft installations and other Sperry/Honeywell components (HSIs, ADIs, flight directors, and autopilots). Practical notes (parts / support) 2591201-903 is usually supported through aviation parts brokers, repair stations, and surplus avionics dealers; listings often appear under ?Sperry compass coupler 2591201-9xx.? We are wholesaler/liquidators. We bought this in a lot of used items to resell. We were told that it is working, but as we do not have the ability to test it, we are listing this AS-IS for parts. Our knowledge of this item is very limited. We are counting upon you to know what you are buying and if this item will suit your needs. There are NO returns accepted for this item. Purchase at your own discretion. We have been honest with you, so no hassles. Please only purchase this if you agree to those terms. *** PLEASE NOTE! Our store buys and sells a variety of new and used electronics, instruments, tools, antiques and many other items. We do our absolute best to thoroughly test all our merchandise and accurately describe and depict any flaw or defect we find. Unfortunately, we do come across items that are outside of our wheelhouse where we cannot properly test them. These items we list AS-IS for parts. It does not mean that they don't work, just that we cannot test them. SHELF: PS-7 SA