Cracked ribs

Edwin Johnson wrote:

Bad luck Jay. Do they have a theory as to how/why the cracks developed?

...Edwin
Hey Edwin...I have no background data on this but would love to find some.


--
Jack Allison
PP-ASEL-Instrument Airplane
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)

On Thu, 30 Mar 2006 22:14:31 -0800, Jack Allison
wrote in
::

It's going to be interesting to see how many folks opt for performing
the SB and how many find cracks.

If we're discussing PA28's, there was a mandatory service bulletin for
inspection of the wing spars that required removal of the wing tanks
issued around August 1996, IIRC. Have you had that inspection
performed?

("Jack Allison" wrote)
Yes, suckage level is extremely high. Right at the one year ownership
point too. Oh well, I'll have some great show and tell pictures for
Oshkosh. What an excuse to have folks crawl around in the grass under my
plane :-)


"...suckage level is extremely high."

Agreed! :-(

I'll have to gauge your temperature in a few months before we decide to
offer ribs at the Rec.Aviation N40 cookout this year.

Good luck harboring your AMU's.


Montblack

IMHO, used parts are ok for some things...but not for this job on our
plane. I'd rather put brand new ribs in despite the higher cost.

Unless the new ribs are of a new/better design, won't they also crack
with time?

Larry Dighera wrote:


If we're discussing PA28's, there was a mandatory service bulletin for
inspection of the wing spars that required removal of the wing tanks
issued around August 1996, IIRC. Have you had that inspection
performed?

SB 1006...yep, it was done a couple years ago. IMHO, this is a
mandatory SB to perform as part of buying a PA28.


--
Jack Allison
PP-ASEL-Instrument Airplane
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)

john smith wrote:

Unless the new ribs are of a new/better design, won't they also crack
with time?

There is a date code on the newer ribs that exempts them from
inspection. Whether that means they're designed differently, thicker,
or what, I'm not sure.


--
Jack Allison
PP-ASEL-Instrument Airplane
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)

Montblack wrote:


I'll have to gauge your temperature in a few months before we decide to
offer ribs at the Rec.Aviation N40 cookout this year.
So long as you don't charge $.55 AMUs plus $.05 AMU crating fee per rib,
cook up all the ribs you want (or have Joe cook 'em up!


Good luck harboring your AMU's.

I think I'll have to rob the flying fund for the next few months.

--
Jack Allison
PP-ASEL-Instrument Airplane
Arrow N2104T

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci

(Remove the obvious from address to reply via e-mail)

On Wed, 29 Mar 2006 20:06:32 -0800, Jack Allison
wrote:

Jack Allison wrote:


Oops...meant to post in r.a.o...bah, stupid fingers!

Piper has a new service bulletin, SB1161 that calls for inspection of
the rib just inboard of the landing gear and aft of the main spar.

That really should be for the pilots who do full stall landings from
10 feet up.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

http://www.newpiper.com/company/Publ...20Insp-Mod.pdf


The SB requires putting the plane on jacks and removing the gear side
brace and bracket.

As 04T is in for the annual, we figured it was a good time to have the
SB performed. It turns out we have cracks on both sides of the rib and
they're bad enough that the repair kit announced in the SB can't be
used. Solution: two new ribs. Cost for parts: 1.1 AMU. Labor is
unknown at the moment but the shop is putting together an estimate.

At least I can split the repair bill three ways...but it's still gonna
put a dent in the flying funds.