The Walter M602 is a turboprop aircraft engine produced by Walter Aircraft Engines of the Czech Republic, used on the Let L-610.
Smiths Aerospace was formerly one of four business units of Smiths Group plc., an engineering company and constituent of the FTSE 100 share index.
 However, it was announced on January 15, 2007 that Smiths Group was divesting Smiths Aerospace to General Electric for US $4.8 billion.
 Smiths Aerospace, which was an important supplier, became an operating subsidiary of GE Aviation.
 This acquisition reportedly gives the combined unit the clout to resist pricing pressures from its two largest customers, Boeing Commercial Airplanes and Airbus.
 Analysts further assert that it will enable General Electric to acquire assets similar to those it desired in its failed bid for Honeywell in 2000.
 GE Aviation completed the transaction on May 4, 2007.
GE Technology Infrastructure is a business group of General Electric composed of three GE companies: GE Aviation, GE Healthcare, and GE Transportation.
 John G. Rice is president and CEO.
 A company-wide reorganization prompted by staggering financial losses led to the unit's formation in 2008 from companies within GE Infrastructure.
GE Aviation, a subsidiary of General Electric, is headquartered in Evendale, Ohio, outside Cincinnati.
 GE Aviation is among the top aircraft engine suppliers, and offers engines for the majority of commercial aircraft.
 GE Aviation is part of the General Electric conglomerate, which is one of the world's largest corporations.
 The division operated under the name of General Electric Aircraft Engines (GEAE) until September 2005.
 GE Aviation's main competitors in the engine market are Rolls-Royce and Pratt & Whitney.
 GE operates two joint ventures with Snecma of France, CFM International and CFM Materials.
GE Honda Aero Engines LLC (or GE Honda) is a joint venture between GE Aviation and Honda Aero based in Cincinnati, Ohio.
 GE Honda is headed by Steven J. Shaknaitis of GE Aviation and Masahiko Izumi of Honda Aero.
 Formed in 2004, the company plans to create jet engines in the 1000 to thrust class, suitable for the business aviation industry.
The General Electric GE93 is a turboprop engine under development by GE Aviation.
 Announced on 16 November 2015 at the National Business Aviation Association's annual tradeshow, the GE93 is the first engine in GE Aviation's Advanced Turboprop (ATP) family.
The CFE Company is a joint venture established by GE Aviation and the Garrett Engine Division of Allied Signal (now Honeywell Aerospace) in June 1987.
 The company produces the CFE738, a small turbofan engine used on the Dassault Falcon 2000.
 "CFE" stands for "Commercial Fan Engines".
Walter Aircraft Engines was a company that manufactured aircraft engines, particularly the M601 turboprop.
 Based in Prague, Czech Republic, the company has been a subsidiary of GE Aviation since July 2008.
A University Development Center (UDC) is an educational-work co-operational program that was founded by Smiths Aerospace in 2005, which was acquired in 2007 by GE Aviation, in Houghton, Michigan.
 The program employs students from the local Michigan Technological University to work on programs that the company is currently working.
 This provides real world work experience for future engineers as well as provide cost effective outsourcing for GE Aviation in the United States.
The Engine Alliance (EA) is an American aircraft engine manufacturer based in East Hartford, Connecticut.
 The company is a 50/50 joint venture between GE Aviation, a subsidiary of General Electric, and Pratt & Whitney, a subsidiary of United Technologies.
 Engine Alliance was established in August 1996 to develop, manufacture, sell, and support a family of modern technology aircraft engines for new high-capacity, long-range aircraft.

Question: What subsidiary of GE Aviation build the engine used on the Let L-610?
Answer: Walter Aircraft Engines