The International Cessna 170 Association

Merry Christmas -- and welcome -- Tony! Your electrical system has been modified from the original. Originally, -- on the 1953 C-170B -- the T&B had no fuse or switch. It, together with the stall warning, were protected by a automatic resetting two amp circuit breaker. When the master switch was...

Bruce, I’ve been with you in the “fuel gauges must only be accurate when tanks are empty” camp. On first glance, CAR 3.672 seems to be straight forward in this regard. But after reading several articles on this subject, I think we are incorrect. Google “aircraft fuel gauge myth” and you’ll find nume...

If I recall correctly a fuel gauge in an aircraft only has to be accurate when the tank is empty. In other words a gage can read full when the tanks are not, they can read half full when there is more than half left but when the tank is empty the gage needs to read empty. … I recalled this discussi...

I agree with Dan that you’re looking at original back seat upholstery. If the moderators agree that it’s original, I’d suggest they place the photo of it with the photo documentation of the 1949 C-170A in the Mx Library. An article in Plane & Pilot Magazine of Jacobson’s 1950 C-170A says, “One o...

Don't be running out and fabricating aircraft hoses from Aeroquip 2807. Wipaire's floats are TSO'd with that hose but it is not approved for other aircraft applications. It is also difficult to install those fittings properly if you haven't done it previously. Good advice. Here's a link regarding T...

In the first criticism you reference AC4.13 advice against checking flexibility of teflon hoses in “high pressure” service…while I was not specifically recommend teflon hose in this application …I can see where it might appear that my recommendation to check their health might have seemed directed ...

I agree George, I should have used the words “not approved” or “not authorized” rather than “not compatible”. But, if I understand John correctly, this clause in the STC is saying that if the C-170 with this prop is on floats, the only floats approved are PK 2300 series floats; there is not approval...

... Hoses inspected and found flexible then. BUT what I didn’t expect that the water soaked hoses had continued to deteriorate and the steel mesh was corroding and breaking down. So when do we replace the hoses and even give them a curious glance. I will now be checking them on every preflight as i...

Take a look at Spruce’s A-740 Rachel control . It has a 10-32 threaded shaft the knob is threaded onto. They use Loctite to secure the knob. The Q&A section there says it can be special ordered without a knob. McFarlane has similar bowden cables. Read this thread for how to use your original kno...

Jay,
As you can see in this thread there are several members here with amazing sheetmetal skills.

Doug,
That entry in October didn't get any traction because you forgot to include FREE in all caps! "FREE" -- the key to a pilot's heart.

I was misreading this limitation as a restriction that the MT prop could only be used on C-170s with PK 2300 series floats — i.e. wheels, skis, or floats other than PK 2300 series floats are not compatible with the MT prop.

John, Thanks for your reply. It appears that the fixed pitch MT prop does not require an STC, but that one of their MTV props (“V” denotes that it is a variable pitch prop) would require an STC to be legal on the C-170. TCDS A-799 for the C-170, under “Specifications pertinent to all models,” states...

I feel quite confident in saying that the C-170B elevators are interchangeable with the L-19 elevators. Not 100% sure, but close to it. In this thread Carl confirmed that the left torque tube, p/n 0534109, on the C-170B matches the L-19 torque tube, p/n 0634106-1. I have an L-19 left elevator tip as...

In that FB thread they said that it will require a propeller repitch rather than a new fixed pitch or constant speed propeller. Probably not enough demand to go through the STC process, but it seems this would be an ideal candidate for an MT-Propeller MTV-20-D electrically-governed propeller. Maybe ...