GTCP85 APU Repair and Maintenance

GTCP85 APU Repair and Maintenance By Greg Napert October 1999 The GTCP85 Series Auxiliary Power Unit (APU), manufactured by Allied-Signal Aerospace Company, is a very common APU that has matured over a period of 20-plus years in the...


Miller explains, "The unfortunate part of taking care of an APU is there is typically little access for maintenance purposes. The APU is often enshrouded in tight areas, so maintenance personnel tend to wait until they have to before touching an APU. Many times, we receive APUs and none of the regular maintenance that you would expect, such as oil and filter changes, appears to ever have been done."

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