Flap Rollers

How to keep the Cessna 170 flying and airworthy.

Moderators: GAHorn, Karl Towle, Bruce Fenstermacher

Post Reply
User avatar
Jwalker
Posts: 18
Joined: Wed Dec 21, 2005 6:30 pm

Flap Rollers

Post by Jwalker »

Does anyone know where I can find a copy of SB95-3?
User avatar
Green Bean
Posts: 163
Joined: Tue May 06, 2003 2:13 am

Post by Green Bean »

Cessna aircraft fleet wide experience flap skin, rib and roller damage due to the flap rollers binding. Cessna issued a service bulletin (SEB 95-3) concerning this problem in March, 1995 and it was revised in September 2001. The bulletin called for an inspection of the flap tracks and rollers to be accomplished every 100 hours or twelve months. It also called for the installation of stainless steel washers on the forward rollers to help prevent flap track wear. We recommend wings with Cessna aircraft assigned insure the flaps are inspected for excessive play at the next 100 hr or annual inspection. It if is necessary to install Cessna kit SK 180-44-1

you can go to Mac Farline http://www.mcfarlaneaviation.com/Produc ... goryID=138& and get the SEB 95-3 rev 1 kit for $10,
User avatar
Green Bean
Posts: 163
Joined: Tue May 06, 2003 2:13 am

Kit contains

Post by Green Bean »

Here is what is in the kit. along with a copy of the Service Bulletin.

Each flap kit contains enough components for one aircraft. In addition to the rollers, bushings, shims, and spacers included in the basic kit, the flap roller upgrade kits include: wear washers required by Cessna SEB95-3, Rev.1 for the forward locations, McFarlane MCSK100 S.T.C. Service Kits for the rear locations, attachment nuts, bolts, washers, and a copy of SEB95-3, Rev.1.

Price $10
Dave Clark
Posts: 894
Joined: Mon Apr 22, 2002 6:25 pm

Post by Dave Clark »

The standard flap kit is $233.21

http://www.mcfarlane-aviation.com/Produ ... r=FLP-KT-1&

Dave
Dave
N92CP ("Clark's Plane")
1953 C-180
User avatar
lowNslow
Posts: 1530
Joined: Mon Apr 22, 2002 4:20 pm

Post by lowNslow »

Green Bean wrote: It also called for the installation of stainless steel washers on the forward rollers to help prevent flap track wear.
you can go to Mac Farline http://www.mcfarlaneaviation.com/Produc ... goryID=138& and get the SEB 95-3 rev 1 kit for $10,
While the wear of the flap track is a concern, the main reason for the washers is to stop wear of the side of the roller into the flap support arm, not the track. I would encourage all B owners to get this done. I have a pretty low time airframe (about 2500 hrs.) and I was surprised at the amount of wear on the arm. It was not near the wear limit but, but if you have a mid to high time airframe, I could see this being an expensive problem if ignored.

As Dave said, the comlete McFarlane kit is $233 and includes a STC servive kit for the inboard aft roller and a copy of the SB. If your rollers are good all you really need are the washers.
Karl
'53 170B N3158B SN:25400
ASW-20BL
User avatar
Indopilot
Posts: 253
Joined: Fri Apr 09, 2004 5:18 am

Post by Indopilot »

I could fax or mail you a copy if you send me your info. Brian
52 170B s/n 20446
56 172 s/n 28162
Echo Weed eater, Jezebeel
User avatar
Jwalker
Posts: 18
Joined: Wed Dec 21, 2005 6:30 pm

Flap Roller

Post by Jwalker »

I want to thank everyone for the help. Just wanted to read the SB before I purchased the rollers. The flap tracks could be out of tolerance. If anyone knows the tolerances please let me know.
Jwalker
User avatar
Joe Moilanen
Posts: 600
Joined: Sun Dec 28, 2003 5:45 am

Post by Joe Moilanen »

I can't remember the exact gap tolerance off hand, .6??? something but I turned down a piece of round stock at one time to the exact specs and can mike it next time I'm at my hanger.

Joe
User avatar
lowNslow
Posts: 1530
Joined: Mon Apr 22, 2002 4:20 pm

Re: Flap Roller

Post by lowNslow »

Jwalker wrote:I want to thank everyone for the help. Just wanted to read the SB before I purchased the rollers. The flap tracks could be out of tolerance. If anyone knows the tolerances please let me know.
Jwalker
The flap track limit is 0.030 over, which is .6025. The flap support arm limit is 0.020 under the original thickness including any clean up to smooth out the circular wear ridge.
Karl
'53 170B N3158B SN:25400
ASW-20BL
User avatar
n2582d
Posts: 2834
Joined: Mon Apr 29, 2002 4:58 am

Re: Flap Rollers

Post by n2582d »

Jwalker wrote:Does anyone know where I can find a copy of SB95-3?
In the Maintenance Library.
Gary
Post Reply