KNOT-RIGHT

see all the holes on the bearing retainer that also is a 703 version part.
its all about keeping this bearing cool.
The three little slotted screws will be removed and look closely they go in the blind tapped holes too use as jack screws.

KNOT-RIGHT

I really could not see under there yet thru the gp noz Bolt holes

See the jack screws

Bearing housing and pinch plate is now removed exposing the bearing Take note on the three crush seals Im gonna shine a flashlight thru the holes to see If i can see anything!

KNOT-RIGHT

Peek a boo i see u have no head!!!
Jim at PPS was able to tell me what it was from 1500 miles away with my iphone video!!
Really!!!
ok now i gotta keep going

KNOT-RIGHT

This is how i could finally view it

I had to compile a bunch of my surrounding Items. Can u tell?
when jim sent me the tools in 2013 i was able
to copy some of the dimensions
but i never got to finalize the space age design
look out nasa

KNOT-RIGHT

Here it is with the diffuser and all removed
this is just how it was sitting.
imagine what that nut was going thru
in there?

speicher lane

How common is head separation on those bolts? Any damage?
... and is it a matter of pulling all the bolts for inspection/ mag flux or just replace 1 or all?

BTW - I always loved your original thread on rebuilding your own turbines, this one is in keeping with the number of PIcs. Quite the undertaking on the Skater overall - would you ever go back to pistons?

28 V

Glad to see you are still wrenching!
I had same thoughts...maybe Jim or Lycoming has an updated bolt recommendation with increased fillet or material change etc..seems like an odd failure for a relatively cool area. If not festidious use of the torque wrench (or stretch) and recommended lubricant!
Looks like the lockplate got away..can they get into combustor from there...nice you found it "early"!

KNOT-RIGHT

I am assuming it happens enough for Jim to call it out.
I had the motors in and out so much as i am 75 percent complete on the fixed bpm installation and as one could imagine i was working with lots of
parts and rigging dragged about. Really thought it was my doing!
the bolts have sps stamped on them dont know if there original.
Maybe Jim will comment on this.
sometimes practicality kicks in and i start thinking center console with clamp ons. Nahhhh
I continue to help and build some good old Chevy big blocks for my people. Nothing beats the good old Chevy with dry pipes!!!
We caught this just in time it would have probably fractured the drain back oil line on that number two brng
Jim ironically has just repaired this same issue on a couple of clients.
let me dig up some pics.

KNOT-RIGHT

yes great question the operating speed in that area is close to 26000 rpm it gets whipped around until the pieces are small enough to pass thru the engine.
god what a thought as seen in the pictures it made it by all those blades. EEEK
Jim had suggested it was the constant thermo expanding and contracting. They look like little connecting rod bolts.
Jim has sent overnight all the bolts and seals! His support is second to none!!!
Will see if they are still stamped by SPS.

KNOT-RIGHT

Here is the oil return line that was getting bashed It looks worse in picture and put about 80 psi of air To it and it did not leak

The very top of the centrifical is visible It was dancing on the top of this

Here is a closeup of one bolt that jim sent On one he repaired