Seats, Tailcone, Knobs and More Beech Upgrades in Sandy, OR

In addition to Aviation Research Systems, Inc., we proudly offer multiple other modification options including Seats, Tailcones, Knobs and more.

Aviation Research Systems, Inc. is proud to be an FAA Repair Station with a fully-functional Avionics Department and Maintenance Facility. This means you're assured quality, exceptionally made aviation products every time.

Aircraft Seat Modifications

Options for Pilot, Co-Pilot and Rear Seat Modifications.


STC/PMA modification replaces existing bench seat in models A-35 thru M-35. This STC allows you to install late style individual pilot and co-pilot seats including headrests and arm rest. Track mounted seats are adjustable fore/aft and recline.


STC allows modification of existing rear bench seat by removing back rest and installing 2 adjustable individual back rests. Beech Bonanza models A-35 thru G-35.
Without Seatbelt

Security Locking Fuel Cap

We have designed our STC/PMA lock fuel caps to eliminate the possibility of unauthorized persons opening the fuel ports to remove fuel or introduce foreign materials into the fueling ports.

Using Our Fuel Cap:
  • Complies with Beech Mandatory Service Bulletin #2045
  • Decreases Size of Fueling Port and Possibility of introducing Jet A Fuel into the fueling port.
  • You should not be able to remove the key from the cap assembly unless you have properly seated, closed, and locked your fuel cap.

Model Series:

  • 35, A35 thru G35
  • H35 thru N35
  • P35 thru V35B
  • B95A, D95A
  • E95, 95 thru A55
  • B55, B55A, C55
  • C55A, D55
  • D55A, E55

  • E55A thru A56TC
  • 58, 95, B95
  • 60, A60, 76
  • 35-B33, C33
  • C33A, E33C
  • F33, F33A
  • F33C, G33
  • 36, A36, A36TC

    Fiberglass Tail Cone

    STC/PMA light weight tail cone improves lateral stability. Our Tailcone will accommodate a strobe/Nav. Clear lens included. Beech Bonanza models 35 thru V35B including 35R.

    Lightweight Steel Tow Bar

    Light weight steel, powder coated red. Fits into nose wheel axle cavity. Features a positive fit for no slip. Beech models model series 35,33,36, 55,56,58,60,76, A60,B60,A90,B90,C90.

    Color Coded Control Knobs

    PMA anodized aluminum alloy knobs and center buttons. Replaces the old worn, cracked plastic knobs and buttons. Installs in minutes. Hardware included. Beech models 35,33,36.