Author Topic: MCI MC9 exterior rivet replacements?  (Read 5909 times)

Offline AeroFluffy

  • Newbie
  • *
  • Posts: 4
Re: MCI MC9 exterior rivet replacements?
« Reply #15 on: February 06, 2013, 08:33:15 PM »
Not sure if this would help at all...

http://www.buses101.com/PDF_Files/MCI%209%20Maint%20Manual%20in%20PDF%20format/MC-9%20-%20Maint%20Manual%20Section%203.pdf

There's a page where they show what rivets are used on each section of the body and provide the model of the ones they originally used.
« Last Edit: February 06, 2013, 09:57:30 PM by AeroFluffy »

Offline Jnbroadbent

  • Full Member
  • ***
  • Posts: 100
Re: MCI MC9 exterior rivet replacements?
« Reply #16 on: February 06, 2013, 09:50:02 PM »
Not sure if this would help at all...

http://www.buses101.com/PDF_Files/MCI%209%20Maint%20Manual%20in%20PDF%20format/MC-9%20-%20Maint%20Manual%20Section%203.pdf

There's a page where they show what rivets are used on each section of the chassis and provide the model of the ones they originally used.

Interesting, the rivets I needed are apparently 7/32x3/8, but the holes (that appear to be stock) are all 1/4" (on the panels AND on the inner supports)
Jon
1980 Mc9 w/ veg oil
8v71
Jacksonville Fl

Offline AeroFluffy

  • Newbie
  • *
  • Posts: 4
Re: MCI MC9 exterior rivet replacements?
« Reply #17 on: February 06, 2013, 10:54:52 PM »
I looked in my aircraft handbook and typically you drill the holes for rivets larger (~2-5 thou) than the diameter of the rivet... so that doesn't account for why the holes are 0.032" larger. If the original rivets weren't installed correctly at the factory or if the panel was ever replaced, the rivets would have been drilled out. If the holes had grown as a result (or someone used a 1/4" drill instead of a 7/32" drill) and 7/32" rivets weren't snugly fitting within the holes, the next size up of rivet (1/4") would have been used. It's also possible that as 7/32" is (to me at least) a weird diameter of rivet, MCI just went with the much more common 1/4" diameter rivets. 1/4" rivets are probably going to be fine to use given that's what was in there originally; if 1/4" rivets are fitting loosely in the holes you might want to go to the next size up (5/16").


(Full disclaimer - I don't know the history of your bus, I'm not a mechanic (or, though I have a degree in mechanical engineering, a P.Eng), and I'm following what I've read for riveting on aircraft)
« Last Edit: February 06, 2013, 11:01:42 PM by AeroFluffy »