Clay Maupin

Clay Maupin received his pilot’s license in 1971 while serving in the U.S. Army at Hunter Army Airfield and has been an EAA member since 1971.

He has a Single Engine Land Commercial Pilot's Certificate with and Instrument rating, but today only flies VFR. While in the army he was assigned to the medical department as a dentist and achieved the rank of Colonel. In his last command he was in charge of all Army Dentists in northern California. After retirement he opened a successful dentist office in Prescott, Arizona which he owned and operated for many years before selling the business and moving to Chino Valley, Arizona.

Clay has built (from plans) a Space Walker II which is hangered on Love Field in Prescott. He has also built (from plans) a Thatcher CX-4 which currently resides in his garage and about ready for its first test flight.

Vice President

Bill Yendrzeski

Bill Yendrzeski received his pilot’s license in 1993 while living in Burlington,Vermont. He currently holds a single engine land license with an IFR endorsement, however he states he has not flown IFR for several years. Although upon receiving his license he had an extensive background in aviation before that. From 1958 until 1964 he was a member of the Vermont Air National guard as an aircraft mechanic. From 1962 - 1965 he worked for Lear Sigler and worked on J5 engines for F-89’s. He then became an aircraft painter before moving to IBM in the fields of manufacturing and engineering from which he retired in 1992. After receiving his license he went into partnership with three friends and became part owner of a Cessna 172 until selling his interest in 2012.
In 1997 Bill was a member of the first (ever) team of American pilots to compete in the European Air Rally in Europe consisting of 80 international teams. This was a navigation and timing event where ETA’s to various check points provided the basis for scoring. Although they didn’t win they had a commendable effort and a great time. Bill has also attended every Reno Air Race since 1985 until today, some of which he had to drive to because of lack of an airplane and is looking forward to this years event. He is also a downhill skier and goes to Flagstaff whenever the urge and weather coincide.


Bill DeRouchey

Bill DeRouchey earned his pilots licensee at the California Orange Airport in 1977 and joined the EAA in 1996. He currently holds a VFR licensee with an IFR endorsement.

Before retiring to Prescott in 2008, he was the President of the Watsonville EAA chapter for two years. After arriving in Prescott he was elected the President of EAA Chapter 658 and served for four years. He is currently active in the EAA and serving on the board of the Prescott Area Users Group.

Bill began his technical career working for McDonnel Douglas Aircraft Company as a software engineer and system designer, middle career was owning a software company developing and selling packaged software for DEC computers, and ending as an engineering manager working for the Symbol Technologies RF division.

Bill wanted to build a 4 place experimental aircraft but the choices were not appealing. Fortunately, Vans developed the RV-10 which became viable in July 2003. He made the decision to buy and mailed a check the day after Vans began taking orders. In 2005, it was time to select a panel and being a technical sort of guy he wanted nothing less than big glass.

There was no reasonable choice on the market except Blue Mountain which was nothing but a PC. With his computer expertise he decided to design and build his own glass panel which over the years has expanded into a fine hobby in itself.

Today, Bill’s primary concern is flying safe by implementing the new FAA ADSB air surveillance system and helping other pilots do the same


John Bauer

John Bauer is the current secretary of EAA chapter 658. He initially joined the EAA in 1984 and after a break rejoined in the 1990s. John has a single engine land pilot license with commercial and instrument ratings that he has held since 1970.

He served seven years in the U.S. Air force and then twenty-one years in the Air Force Reserves. He flew as a navigator on the C-141 worldwide including Vietnam and on the C-130 in Sarajevo among many destinations. He also spent time as an Instructor WSO (back-seater) in the F-4 Phantom, retiring as a Lt Col in 1999.

In civilian life was an aerospace engineer working for several defense contractors. In the late 1980s he started to build a Long EZ in his garage, but because of circumstances it is still only half finished. He eventually purchased a completed Long EZ since flying was preferable to building.

He flew his Long EZ to AirVenture (Oshkosh) in 2015 and 2016. He highly recommends flying in at least once, if possible. He has made many cross-country trips and more are planned to enjoy the freedom of flight in his Long EZ to the fullest. It is unsure if he will complete the original half finished Long EZ.

John has also been a Mission Pilot for the Prescott Squadron of the Civil Air Patrol (CAP) since 2007.

Web Master

Dave Roy

Member since 1988

Dave has over 20 years of experience in the collegiate flight training environment. Prior to joining Guidance Aviation, Dave was the Director of Flight Operations for Allen Corporation of America. His previous work experience includes several positions held at Embry-Riddle Aeronautical University, Prescott Campus starting in 1989 where he was a Flight Instructor. He went on to manage Aviation Safety, Flight Academics, Contract Training and Flight Standards.

In 1991, Dave took a sabbatical to complete a graduate internship, with the Smithsonian National Air & Space Museum primarily assisting in the restoration of the B-29, the Enola Gay.

In 2002, Dave volunteered at the Winter Olympic and Paralympic Games at the Snowbasin Resort in Utah where he helped coordinate support personnel for the Alpine Ski Events at the Salt Lake City Winter Olympics.

In 2003, he created the Prescott Air Fair Association, a non-profit 501 (c)3 organization which began producing local air shows. He is past president of the Prescott EAA Chapter 658. In 2005 Dave was awarded an Air Medal from the Fédération Aéronautique Internationale (FAI) for significant contribution to the progress of Aeronautics and Astronautics in connection with the FAI Education Commission.

Dave and his wife Kendall own a 1947 Cessna 140 airplane that was a restoration project of EAA Chapter 658.