RV7 condition inspection completed a couple of months ago. Checked, cleaned and bled brakes. Have flown about 20 hours over the last several months. No issues that I noticed. Was checking a issue with wiring, looking under the panel and sub panel when I noticed air in the line for my left brake. No leaks located on the floor, along the line(s) or on on any of the brake master cylinders. No leaks at either brake assembly or around the brake reservoir on the firewall.
Re-bled the brakes, all air removed from the lines. Checked the brakes by pumping the brakes several times and noticed air in the lines and brake fluid leaking through the brake reservoir top nut. No leaks around any master cylinder, around brake assemblies or any brake line. Only air in the left brake line.
I have rebuilt one master cylinder about two years ago, not that hard but I am not as flexible as I once was and it resulted in a real mess in the cockpit floor area.
I am baffled since there has been no evidence of leaking fluid in or around the RV. Any suggestions on what to check other than removing and rebuilding the master cylinder?
Re-bled the brakes, all air removed from the lines. Checked the brakes by pumping the brakes several times and noticed air in the lines and brake fluid leaking through the brake reservoir top nut. No leaks around any master cylinder, around brake assemblies or any brake line. Only air in the left brake line.
I have rebuilt one master cylinder about two years ago, not that hard but I am not as flexible as I once was and it resulted in a real mess in the cockpit floor area.
I am baffled since there has been no evidence of leaking fluid in or around the RV. Any suggestions on what to check other than removing and rebuilding the master cylinder?