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float kit install
Posted: Tue Dec 17, 2013 10:27 pm
by cverdoljak
I'm going to start the install of my float kit and still need part #0541127 does anybody have one or a template to make one, i also need the lifting eyes and a v brace. The 0541127 is an angle on the bottom of the station 90 rib. Any tips and advice would be great, along with any install drawings if they exist.
Re: float kit install
Posted: Wed Dec 18, 2013 4:38 am
by 54170b
The v brace can be purchased from f atlee dodge, and the float kit isn't too hard to make but you will need to install the second bulkhead witch requires removing and modifying your floor slightly
Re: float kit install
Posted: Thu Dec 19, 2013 10:59 pm
by minton
Cessna still stocks the angles
As to measurements?? Cessna drawings do not provide them. In the past I have tracked down a C-170/180 with a kit and measured the distance between the block holes.
Second bulkhead?? No such thing required in C-170 float kit. If you are also installing a "Baggage door" you might want that sta. 90 bulkhead "Doubler" as Cessna calls for it in C-172-C175 p/n 0512113-7. It is a partial bulkhead. It will cover the float doubler issue and do away with p/n 051132 &0541132-1 doublers required in C-170 float kit installations.
You will not see that bulkhead called for in most "After Market" bagage door STC kits.
My PMI says just do it as a matter of course and include it in your installation discription on FAA form 337 of either float kit or bagage door.
Most baggage used doors offered do not include it so be careful to ask when buying those.
Re: float kit install
Posted: Sun Dec 22, 2013 9:52 pm
by Blue4
The lifting eyes can be purchased from Air Repair in Mississippi; use the L-19 part numbers (they cross reference perfectly).
The V-brace will require a field approval.
If you don't have the Cessna drawings you shouldn't be attempting this install. PM me for some reference information.
I believe the part that you need is the curved angle that sits on the bottom skin above the flanges? Your best bet in that case is to get it from Cessna. (As I recall it was about $100). It will still need to be stretched/shrunk to fit your airplane. Because its curved angle it will be difficult to fabricate this part.
The float kit install looks simple, but the precision of it takes a lot of time. Minton did a nice job on his, and mine turned out nice as well.
Good luck with the install; it took me all winter several seasons ago.
Re: float kit install
Posted: Tue Dec 24, 2013 1:29 am
by kbbell
What's a reasonable cost for parts and how many hours would an A & P charge to complete the install, assuming that they've done them before?
Re: float kit install
Posted: Fri Feb 21, 2014 7:47 am
by Blue4
I had difficulty finding a sheet metal person or an A&P who had done a 170 before ANYWHERE in Alaska. It seems that the 170s that had been converted to floats all had been done long ago, and none in recent memory. In other words, the corporate knowledge had retired.
The original quote I was given by a Sheet Metal Shop was $14k. Parts for the airframe-side-only will run you about $3k. Start collecting early, and you'll have 75% of a float kit left over when its all said and done.
In the end, it took about 80 man-hours of labor to finish the job. That's about 40 hours of skilled A&P time and another 40 hours unskilled grunt work (=ME). However, that includes putting in a baggage door at the same time. This both simplified and complicated the job.
If I owned a sheet metal shop and was bidding for your business, a 170 float-kit only install would bid at 70 hours at my shop rate. Shop prices here in Alaska vary from $95-120 an hour.
Good luck!! Green grease makes everything happen.
-Scott
Re: float kit install
Posted: Fri Feb 21, 2014 9:02 am
by minton
kbbell wrote:What's a reasonable cost for parts and how many hours would an A & P charge to complete the install, assuming that they've done them before?
If you live someplace warm, have all of the parts, tools and put me up I'll cut you a deal.
Re: float kit install
Posted: Thu May 05, 2016 2:47 am
by bagarre
Old thread brought back to life
Does anyone know the thickness/material of the infamous station 90 doubler?
We're putting a float kit and baggage door in 95D and would like to add the doubler for safe measure.
tks
Re: float kit install
Posted: Sun Dec 04, 2016 6:55 am
by n2582d
minton wrote:... Second bulkhead?? No such thing required in C-170 float kit. If you are also installing a "Baggage door" you might want that sta. 90 bulkhead "Doubler" as Cessna calls for it in C-172-C175 p/n 0512113-7. It is a partial bulkhead. It will cover the float doubler issue and do away with p/n 051132 &0541132-1 doublers required in C-170 float kit installations.
You will not see that bulkhead called for in most "After Market" bagage door STC kits.
My PMI says just do it as a matter of course and include it in your installation discription on FAA form 337 of either float kit or bagage door.
Most baggage used doors offered do not include it so be careful to ask when buying those.
I think John may be confusing p/n 0512113-7, (which is a sub-assy. of p/n 0512113, the sta. 90 bulkhead assy., in the C-170A, C-170B and all straight tail 172's and 175's, with or without the baggage door) with the half bulkhead which has no p/n but is part of the sta. 90 bulkhead assy., p/n 0512113-9, on straight tail 172's and 175's with baggage doors. The 0512113-7 sub-assembly is referred to as "angle - bulkhead reinforcement". There is no flange on the bottom of the reinforcement, only on the top. Here's a picture of what mine looks like looking aft at sta. 90. As you can see it only reinforces the sta. 90 bulkhead under the floor. It does not extend above the floor.
IMG_0149.JPG
Elsewhere John gets it right in my opinion; the half bulkhead reinforcement has no part number; it is an additional doubler on the backside of the sta. 90 bulkhead. Here is what he has to say in posts regarding installing a baggage door:
minton wrote:Station 90 bulkhead is doubled up in the lower half to beef up the door and skin lap joint @ sta. 90. It extends from side to side. Very hard to find the part number. Most STC's don't address that part but if it were me, I would do the research, find the part and install it. Espeacially if I was operating off airport.
So far I've only seen it shown in figure 45A (hinge area) Pg. 142 of C-172-175 1956-1962 parts manual. No part or reference number in that catalog. Maybe other catalogs will show it better. A cruise around the airport confirms the doubler and extra row of rivets @ sta. 90 on many later planes with bag doors. Tri-cycle and tail draggers.
minton wrote:Well, after much searching the correct part number for sta. 90 bulkhead assy. WITH BAGGAGE DOOR has been verified as 0512113-9 this includes the half bulkhead reinforment that I have been mentioning in previous posts. This is probably but not verified as the same as 074211-1 or a close match which is used in later float plane kit installations. NON door bulkhead p/n is 0512113.
I am in the process of verifying with Cessna Corp. and my PMI as to the inclusion of said bulkhead in any after market baggage door kits. In my opinion, if not, ACO's and DER engineers could and should reveiw their STC's for any potential need for updates/revisions to their kits.
At some point down the road I expect the FAA will issue something on the subject.
Now, as per my PMI, you can "Upgrade" your STC by the installation of said bulkhead being within the same catagory of airframe and it only requires a logbook sign off referencing the STC and IPC part number. The down side? Finding referenced bulkhead as a used part. This is where I have suggested to persons contemplating that potential installation by STC and searching for parts, insist on buying the sta. 90 bulkhead assy. with the other baggage door parts when they are removed from salvaged birds as it would be the -9 part. If you use that appoach then you don't need to order one from Cessna as a Made to Order (MTO) part costing big bucks or looking elsewhere such as salvge yards, or C-180's with float kits.
Re: float kit install
Posted: Mon Dec 05, 2016 12:53 am
by ghostflyer
While i was modifying my aircraft this bulkhead at 90 in, was inspected and found with bracing on both sides of the fuselage form . This was only towards the curvature of the form where it joins the floor . So we placed extra support on the vertical part of the form with 40 thou 6015 T4 aluminium. This was bonded and riveted to the original form. I conferred with Harry Delicker the owner of the baggage STC and he said include it in a log book statement with the STC. He strongly supported the addition.