VMA-A140X Apache III 40 ARF ECS Trainer 69" - Engine Clamp Bolts - How to Remove

Question: I want to completely remove the engine clamp bolts from the engine mount in my Apache III. How do I do this?

Answer: This is not difficult but if it is necessary, there are two ways to approach this.

  • Method A: Undo the engine mount bolts that retain the engine mount to the firewall. Try to just loosen them enough so that you can toe the engine mount beam inwards at the nose and then subsequently remove the engine clamp bolts. Then retighten the engine mount bolts to secure the engine mount beam to the firewall.
  • Method B: Notch small cutouts into the lip of the fuselage that wraps into the engine compartment. The cutout notches should be positioned above each engine clamp bolt. Once the cutout notches have been completed you will be able to to undo the engine clamp bolts and remove them without moving the engine mount beams. Use a dremel tool or a small round bastard file to cut out the notches. Seal the exposed wood in the notches with Pacer Finishing Resin or thin ZAP/CA to prevent oil and fuel residue from penetrating into the wood.