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  #1  
Old 05-15-2012, 05:25 AM
Kyle Boatright Kyle Boatright is online now
 
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,208
Default Brake Disc Replacement

What are the objective measures to determine when to replace aircraft brake discs? I have 800 hours and a couple of thousand landings on my original discs and have no idea how to determine when to replace them.

Thanks in advance,
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Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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  #2  
Old 05-15-2012, 08:31 AM
Dean Pichon Dean Pichon is offline
 
Join Date: May 2006
Posts: 532
Default Look for the P/N

On my Cleveland discs, the P/N is stamped into the edge. With that P/N and the Cleveland disc brake manual (available from their website), you can look up the wear limits for your disk. I measured mine this past annual (~600 hours/~1000 landings) and found I had only a few mils left to work with before they will need to be replaced.
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  #3  
Old 05-15-2012, 09:11 AM
erich weaver's Avatar
erich weaver erich weaver is offline
 
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Location: santa barbara, CA
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Default

Replace them before the pads are worn down to the point that the rivet heads are in danger of making contact with the rotors and wearing grooves into them. When you dissassemble the brakes the first time, this will become obvious. I would suggest keeping a couple of sets of brake pads on hand, along with the special brake rivet setting tool so that they can be replaced when needed without waiting for your next ACS order to arrive.

erich
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  #4  
Old 05-15-2012, 11:05 AM
krw5927 krw5927 is offline
 
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Location: Wichita, KS
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Default

Think Kyle was talking about the actual disc (rotor, in the car world) rather than the pads. Sage advice about keeping 2 spare sets and the tool on hand though.
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RV9A
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  #5  
Old 05-15-2012, 11:36 PM
erich weaver's Avatar
erich weaver erich weaver is offline
 
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Ahhh, my bad. Should have read the post more carefully.
e
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