Flap repair

rupertjl · Post by **rupertjl** » Mon Sep 18, 2006 12:54 pm

Ernesto got one of my flaps after it blew the gust locks off. The right flap is off now for repair at the inboard hinge but I was looking at the spring tab (p/n 0520120-2, item #11-5 figure 11 of the 170A parts manual) mid-span on the flap spar and noticed the hole was more of a slot, is it suppose to be like that or just a single hole? The parts manual doesn't show that great of detail and while the flap is off, if it needs replaced, might as well do it.

Thanks!

V/r,
Jud

Indopilot · Post by **Indopilot** » Mon Sep 18, 2006 2:35 pm

I believe you have a 170A with the 140 style flaps. The spring attach point started off as a hole. You can do a weld repair to get it back to the way it started out. It would be a good idea to check both ends as well as the spring itself for wear. Brian

blueldr · Post by **blueldr** » Tue Sep 19, 2006 3:13 am

That part of the airplane is most likely fabricated of 24ST alloy which is not classed as a weldable alloy.

thammer · Post by **thammer** » Thu Sep 21, 2006 3:15 am

Flap tube and the welded on spring tab (arm) are 1025 steel on a 140. Dug up the 170 pre 59 parts catalog and figure 11 in it is the fin assembly. Figure 5 shows the left aileron and flap. Figure 41 shows the flap control system and it looks like it leaves out a couple bits and doesn't list a spring. Figure 2 shows the flap bellcrank and pushrod assembly but doesn't show a flap return spring.

Indopilot · Post by **Indopilot** » Thu Sep 21, 2006 4:31 am

Opps, Sometimes its better be thought an idiot than to open your mouth and remove all doubt.

thammer · Post by **thammer** » Fri Sep 22, 2006 3:55 am

rupertjl wrote:Ernesto got one of my flaps after it blew the gust locks off. The right flap is off now for repair at the inboard hinge but I was looking at the spring tab (p/n 0520120-2, item #11-5 figure 11 of the 170A parts manual) mid-span on the flap spar and noticed the hole was more of a slot, is it suppose to be like that or just a single hole? The parts manual doesn't show that great of detail and while the flap is off, if it needs replaced, might as well do it.

Thanks!

V/r,
Jud

I'm a 140 guy and don't have a 170 nearby to look at, so I have to ask, is there a spring on that spring tab? Where's the other end attach?

Is there a separate IPC for the 170A?

rupertjl · Post by **rupertjl** » Fri Sep 22, 2006 8:27 pm

yep there's a spring attached...and it goes through the rear spar and attaches to another tab inside the wing. That flap was put back on today and flight tested (ok, so I just wanted to see how the new 8.00x6 tires rolled) and everything works. I didn't replace the flap tab, but I'll keep an eye on it, it's worn more on the right flap then the left. I suppose that little piece is $50 for a NOS piece.

The International Cessna^® 170 Association

Flap repair

Flap repair

Re: Flap repair