Broken brake line, etc.
Over the years I have heard about this type of failure with regularity. Some of my local RV buddies have encouraged me to terminate my brakeline near the bottom of the gear leg, and then buy a pre-built up brake line to go from there to the brake caliper. From what I've seen of this installation over the years, it seems to be quite a bit less prone to a catestrophic failure, than spiraling the brake line around the gear leg bottom before hooking it up to the caliper.
An RV-6A buddie had his flared fitting fail and it created a massive fireball that went over the leading edge of the wing, and got his immediate attention! It had failed upon application, the brake pedal immedately went to the bottom, and fluid sprayed all over the hot brake assembly and ignited. His "fix" for the future was to switch to a different hydraulic fluid (higher flash point), and he also went with built up brake lines on the ends.
Doug Lomheim
RV-3 Restoration
RV-9A / 13B on hold