Aileron cable routing, Brakes, Flap Mechanism, Fuel tank cover

Aileron cable routing

I drilled and then elongated a hole in the bottom wing skin for the aileron cable to exit where it enters the wing strut.

The pulley guard that had been welded correctly yesterday was then corrosion inhibited, then installed.

Brakes

This afternoon I used a friends fluid pump to pressurise the brake systems from the bottom up, pumping fluid right through to the reservoir. This brought to light several issues. Two connections on the park brake valve hadn’t been tightened, and they were around the wrong way. I corrected this, then bled them again.

Finally I lifted each wheel off the ground and did a thorough check of the system.

1.The brakes activate and release properly, with the left brake pedal braking the left wheel, right pedal brakes the right wheel.

2.The park brake locks on both wheels and releases fully as it should. When the fuselage is back off the wheel dollies, I will check the P/B overnight and see if it holds pressure.

3.If the P/B is applied without depressing the brake pedals, the brakes remain off until the pedals are depressed at which stage the park brake then locks with the pressure applied at the time. This is a situation to be aware of, because the aircraft can be taxied with the park brake pulled ON, if the pedals were not depressed. Subsequently depressing the pedals will add pressure and gradually lock the wheels.

4.The park brake knob is working in the expected orientation - pull out = ON. In = OFF.

Flap Mechanism

I added the AN3 bolts to secure the flap spring arms to the torque tube and torqued them to 3nm.

Fuel Tank Cover

The fuel tank cover had been drilled at the factory already. I enlarged the holes and deburred them, then dimpled them and beveled the edges. The result is a good fit. I still need to add the 4 corner nutplates to finish this area.