VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 08-25-2015, 07:05 PM
N941WR's Avatar
N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
Default Brake check?

One of my neighbors who happens to be an IA lost his left brake on his 310 during rollout and went off the runway. The result was that he ripped the left wing off, just outboard of the left engine, when he used a tree for a parking brake.

The plane had just come out of annual and he said the brakes were fine and that he had put new linings in them.

My questions to this group are:

1. How can you inspect the caliper?
2. Should the calipers be rebuilt at a set interval?

(No one was hurt in his incident, only tree was harmed in the making of this story.)
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
Reply With Quote
  #2  
Old 08-25-2015, 10:16 PM
bhester's Avatar
bhester bhester is offline
 
Join Date: Jan 2005
Location: Hopkinsville, KY
Posts: 991
Default Reinsalling the brake pucks

I don't know if his brakes are like ours but if they are he more than likely installed the puck backward with the o-ring facing out. if he did then the o-ring came out too far when the brakes were applied and he lost his hydraulic fluid and the brake no longer worked.

Read about it and see the pictures here:
http://home.newwavecomm.net/bobbyhester/2012Flying.htm

I have a friend that ran his plane into the large metal post in front of a fuel pump, prop first because of this :-(
__________________
Bobby Hester - Builder/Pilot/A&P
Surfing the web from Hopkinsville, KY
N857BH RV7A XP-O360 - Garmin G3X ADS-B IN/OUT 2020 Compliant
Web site: http://www.newtech.com/bobbyhester/RVSite.htm
Dec. 2020 VAF donator - alot better than any magazine subscription
Reply With Quote
  #3  
Old 08-26-2015, 04:40 AM
N941WR's Avatar
N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
Default

Quote:
Originally Posted by bhester View Post
I don't know if his brakes are like ours but if they are he more than likely installed the puck backward with the o-ring facing out. if he did then the o-ring came out too far when the brakes were applied and he lost his hydraulic fluid and the brake no longer worked...
Nope, they were installed correctly. Good thought though. It appears they "just" failed.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
Reply With Quote
  #4  
Old 08-26-2015, 06:06 AM
TS Flightlines TS Flightlines is online now
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,712
Default

HUM---so what was the failure---hydraulics, or lack of, or lining failure?
Mastercylinder, brake hose, aluminum line, lining departed from rivets, etc?

No flame war here Bill, just interested in the cause of the failure.
Kinda like the 'hatch just blew. It was a technical malfunction'.

Inquiring minds may want to know.
Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
Reply With Quote
  #5  
Old 08-26-2015, 09:23 AM
aerhed aerhed is offline
 
Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
Default

They don't just fail. Something was wrong. Those linings aren't riveted, they clip over stud rivets on the plates and if the studs aren't great the linings can slip off. There are also more parts to get wrong like brake shims and piston insulators. Good lesson here. Always stand on brakes and give them a torture test after reassembly. After dropping the gear ALWAYS do a brake check BEFORE landing.
__________________
Actual repeat offender.
Reply With Quote
  #6  
Old 08-26-2015, 12:50 PM
N941WR's Avatar
N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
Default

Quote:
Originally Posted by TS Flightlines View Post
HUM---so what was the failure---hydraulics, or lack of, or lining failure?
Mastercylinder, brake hose, aluminum line, lining departed from rivets, etc?

No flame war here Bill, just interested in the cause of the failure.
Kinda like the 'hatch just blew. It was a technical malfunction'.

Inquiring minds may want to know.
Tom
No flame here either but the question is, how do we inspect our brakes properly? Inspecting and replacing our linings is easy but how do I know if the puck and O-rinngs are in good shape? Should we rebuild ours every X hours or Y years?


(His O-ring split.)
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html

Last edited by N941WR : 08-26-2015 at 12:58 PM.
Reply With Quote
  #7  
Old 08-26-2015, 12:54 PM
TS Flightlines TS Flightlines is online now
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,712
Default

Split o rings can happen at caliper overhaul, or from age. Either way, its a bad feeling when they dont work.
Explains the technical malfunction. Fluid loss, equals no hydraulics.
Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
Reply With Quote
  #8  
Old 08-26-2015, 01:00 PM
N941WR's Avatar
N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
Default

Quote:
Originally Posted by TS Flightlines View Post
Split o rings can happen at caliper overhaul, or from age. Either way, its a bad feeling when they dont work.
Explains the technical malfunction. Fluid loss, equals no hydraulics.
Tom
Yep, major bummer as it tore up a nice airplane!

So... how long should we wait to change our O-rongs?
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
Reply With Quote
  #9  
Old 08-26-2015, 01:35 PM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,430
Default Brakes

Did that happen at SC86??
With a reasonably wide runway there is no need to go off the runway if you lose the brake in ANY Twin Cessna. I have had brake failures in the 414 and Piper Navajo, reasonably long runways, no problem either time.
Flying a 310 out of a runway like SC86 is just asking for trouble. WAY too high risk.
Reply With Quote
  #10  
Old 08-26-2015, 01:55 PM
TS Flightlines TS Flightlines is online now
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,712
Default

Bill---I dont think you can put a time on it. Some guys are harder on brakes than others. High heat will transfer to the caliper, including the piston and o'ring. So the heat cycles will have an effect on the o'ring, causing issues. How long, is anyone's guess, but I'd have to say 250 hours (?).
maybe Grove, Matco, or Cleveland has a 'recommendation'.

Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 11:45 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.