[rebel-builders] RE: Rebel - Wing Spar Cap Bolts.
Posted: Sun Feb 19, 2012 5:49 pm
If someone thinks they might have "shouldered" their bolts in the wing,
perhaps a "whole plane" inspection for similar bolt issues elsewhere is in
order.
Just a thought. Not pointing fingers at anyone in particular. AC 43.13-1B
section 7-37 on page 7-5 provides guidelines for grip length bolt/washer
use. I'd be happy to email anyone interested this chapter (it's in PDF
format).
Ted
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
schaumr@dcsol.com
Sent: Wednesday, December 02, 2009 1:38 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] RE: Rebel - Wing Spar Cap Bolts.
Thanks Wayne,
For those of us with completed wings, in your estimation how many hours can
we expect to take to 1) inspect for "shouldered" bolts (including the entire
length of the wing) and 2) re-washer offending bolts? It sounds daunting.
Rob
Rebel 786
Old Saybrook, CT
On 12/2/2009 9:08 AM, oifa@irishfield.on.ca wrote to rebel-builders:
-> Not sure if anyone on the list is still in the wing build stage on their
-> Rebel... but if you are......I've been "inside" 7 wings since late
September
-> and every friggin one of them has the AN3 bolts "shouldered". These are
the
-> bolts that attach the 1/4" thick spar caps to the main spar. One wing,
out
-> of a pair, that I was in.. even had the spar backer bolted in this way
the
-> FULL length of the wing !!.. not just the three bays around the attach
-> strut.
->
-> The overlength bolt/threads showing is an oversight on MAM's part in the
-> manual and in their AN960-10 washer supply... but every one of these
bolts
-> needs an extra washer fellas so go buy a couple hundred now for $20.
When
-> you can see 3+ threads showing on an AN3 bolt the nut is shouldered onto
the
-> grip of the bolt and it's not really tight..and possible that it's been
-> cracked from running out of thread.
->
-> The really sad part.. only two of these wings that I've inspected/worked
on
-> are USA built that can have an "excuse" with no preclose inspections
south
-> of our border.. but the Canadian ones.. should have been snagged before
they
-> got closed up this way!
->
-> That is all...
->
-> ;O)
-> Wayne
->
->
->
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perhaps a "whole plane" inspection for similar bolt issues elsewhere is in
order.
Just a thought. Not pointing fingers at anyone in particular. AC 43.13-1B
section 7-37 on page 7-5 provides guidelines for grip length bolt/washer
use. I'd be happy to email anyone interested this chapter (it's in PDF
format).
Ted
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
schaumr@dcsol.com
Sent: Wednesday, December 02, 2009 1:38 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] RE: Rebel - Wing Spar Cap Bolts.
Thanks Wayne,
For those of us with completed wings, in your estimation how many hours can
we expect to take to 1) inspect for "shouldered" bolts (including the entire
length of the wing) and 2) re-washer offending bolts? It sounds daunting.
Rob
Rebel 786
Old Saybrook, CT
On 12/2/2009 9:08 AM, oifa@irishfield.on.ca wrote to rebel-builders:
-> Not sure if anyone on the list is still in the wing build stage on their
-> Rebel... but if you are......I've been "inside" 7 wings since late
September
-> and every friggin one of them has the AN3 bolts "shouldered". These are
the
-> bolts that attach the 1/4" thick spar caps to the main spar. One wing,
out
-> of a pair, that I was in.. even had the spar backer bolted in this way
the
-> FULL length of the wing !!.. not just the three bays around the attach
-> strut.
->
-> The overlength bolt/threads showing is an oversight on MAM's part in the
-> manual and in their AN960-10 washer supply... but every one of these
bolts
-> needs an extra washer fellas so go buy a couple hundred now for $20.
When
-> you can see 3+ threads showing on an AN3 bolt the nut is shouldered onto
the
-> grip of the bolt and it's not really tight..and possible that it's been
-> cracked from running out of thread.
->
-> The really sad part.. only two of these wings that I've inspected/worked
on
-> are USA built that can have an "excuse" with no preclose inspections
south
-> of our border.. but the Canadian ones.. should have been snagged before
they
-> got closed up this way!
->
-> That is all...
->
-> ;O)
-> Wayne
->
->
->
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