Ski sign off question

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Marshmallow

Registered User

Missoula Montana

• Jan 3, 2017

• #1

Hello:
I just finished installing my skis on my plane. I made new SS cables (1/8"), made new bungie cords (1/2") that at I got from Stoddards. I installed new longer bolts in my landing gear due to the brackets needed. I followed AC 43.13-2B chapter 5 for installation guidance. I did use Federal 11A109 retaining washers to hold the skis on the axle. I weighed my skis and they weigh 14.5 pounds each, and my tires weigh 17 pounds.


My question is this...since these are federal A1500 skis and are on the TDC, can an A&P sign off the installation (I am not a certified mechanic, but have been working on my own planes for 16 years)? Also, it is my guess that the equipment list and weight an balance will also need to be updated. Is this all the paper work that will be involved for my to legally fly?


Thanks, Bob

 

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mvivion

SPONSOR

Bozeman,MT

• Jan 3, 2017

• #2

Bob,

Yes, an A and P mechanic can sign off those skis. He'll want to work a new w/b and equipment list, assuming you have one (and you should). Other than that, go have some fun. Just remember to take along good cold weather camping gear.....

MTV

 

cubdriver2

FRIEND

upstate NY

• Jan 3, 2017

• #3

I think you just need a new W&B and I think you can put them on and off yourself?

Do yourself a favor before you fly it. Go out where the struts meet the wing and lift one side up off the ground and make sure it looks like it should in a flying attitude to proof your work.

Glenn

 

Last edited: Jan 3, 2017

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willyb

Registered User

Maynard,MA

• Jan 4, 2017

• #4

I believe the regs say that after the first sign-off then you are legal to do it yourself.Just how I understood it.

Bill

 

mvivion

SPONSOR

Bozeman,MT

• Jan 4, 2017

• #5

willyb said:

I believe the regs say that after the first sign-off then you are legal to do it yourself.Just how I understood it.

Bill

Click to expand...

Ive always understood this to be the case. That said, you'll always find folks who say that installing/removing skis is not a "preventive maintenance" item. But, for sure, that initial install needs to be signed off by a certificate mechanic.

MTV

 

S

stewartb

MEMBER

…

• Jan 4, 2017

• #6

Is it allowed as owner maintenance?

Replacing wheels and skis where no weight and balance computation is involved. Enough said.

Click to expand...

Item #18 in the linked document.

https://www.aopa.org/training-and-safety/pic-archive/aircraft-ownership/preventive-maintenance

 

BC12D-4-85

SPONSOR

Fairbanks, AK.

• Jan 4, 2017

• #7

P/M as long as no hydraulic fittings are involved. Given that most owners put a temporary hose clamp over expanding brake pads or insert a spacer in disc calipers and leave them installed as is...no hydraulics are wrenched. That's what my I/A says and he knows lots more than I ever will.

GAP

 

wireweinie

FOUNDER

Palmer, AK

• Jan 4, 2017

• #8

As per stewartb's statement.

Look at Part 43, appendix A, (c) preventive maintenance. Line 18 states "Replacing wheels and skis where no weight and balance computation is involved." That means that the first time you switch to skis, you need to work up a new weight/balance sheet and you need to be an A&P to make that official. That's where the 'first time' idea comes from. Once you have a weight/balance sheet for wheels and for skis, as the owner/operator, you can switch back and forth as necessary and log that as preventive maintenance noting which weight/balance sheet you are now using.

Web

 

Dave Calkins

Registered User

Anchorage, Alaska

• Jan 4, 2017

• #9

A mechanic whould sign off the ski rigging fabrication also.

A&P or IA???

 

wireweinie

FOUNDER

Palmer, AK

• Jan 4, 2017

• #10

A&P.

Web

 

S2D

MEMBER

Montana

• Jan 4, 2017

• #11

Dave Calkins said:

A mechanic whould sign off the ski rigging fabrication also.

A&P or IA???

Click to expand...

If its on the TC an A&P will suffice. If its not, you be the judge .............

 

M

Marshmallow

Registered User

Missoula Montana

• Jan 4, 2017

• #12

I have worked up some equipment lists and W&B for the mechanic to sign off on. Do these look official?

View attachment Cub weight and balance extremes.pdf
View attachment Cub equipment List.pdf
View attachment Cub weight and balance history.pdf

Thanks for checking up on me.

Peace

 

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• Cub weight and balance extremes.pdf

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BC12D-4-85

SPONSOR

Fairbanks, AK.

• Jan 4, 2017

• #13

Marshmallow said:

I have worked up some equipment lists and W&B for the mechanic to sign off on. Do these look official?

Peace

Click to expand...

Better check...I think the RU's have hacked your PC.

GAP

 

M

Marshmallow

Registered User

Missoula Montana

• Jan 4, 2017

• #14

Damn they got me...
I posed this on the J3 forum also. The files work there.

http://www.j3-cub.com/forum/showthread.php?p=301321#post301321

 

spinner2

MEMBER

Montana

• Jan 5, 2017

• #15

Good to see you're getting close Bob.



This was yesterday on the Noxon reservoir. It was all sun, about 0º and just a little east wind. Oh and all fun.

I meant to ask before, do you have sea plane lifting eyes? It sure makes it easier to swap over to skis with the chain hoist. If you don't, consider installing a set.

 

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