Aircraft Precision Products

Aircraft Precision Products, also called APPI, is a metalworking company in Ithaca, Michigan. It supplies parts to the commercial and military aircraft engine industry. The company has operated since 1946. It is an employee owned small business.

APPI specializes in complex turned parts for gas turbine engines. Its machine specialties include jet engine bearing housings, retainers and supports. It also does rotating and complex turning, EDM machining and monitored holemaking. EDM means electrical discharge machining, which shapes metal with sparks. The company says it has been a key supplier to General Electric Aircraft Engines and the U.S. Department of Defense since it began.

The shop works with high temperature alloys based on nickel, cobalt and titanium. It turns diameters from 4 to 50 inches, with widths up to 19 inches. APPI also says it gives customers feedback on how easy a part is to make.

The plant covers more than 58,000 square feet. The company lists CAD and CAM software, fully automated coordinate measuring machines, four and five axis CNC machining centers and many CNC lathes. Together with skilled staff, these tools support its quality and delivery goals.

APPI is NADCAP accredited and ISO certified. The NADCAP scope covers EDM, coatings, non-destructive testing and conventional machining as special processes. The company also lists plasma and thermal coatings and dry film lubrication.

Its testing facility offers magnetic particle inspection and fluorescent penetrant inspection. These methods find surface flaws in metal parts without damaging them. The shop also does millipore cleaning.

The company states a commitment to lean manufacturing. It says many employees have worked there for more than 20 years. APPI also says it wants strong, lasting ties with its staff, suppliers and local communities. The website has a contact page that lists key managers, including operations, engineering quotations and production control.