Hello all, for several years now many of you have been preaching against
using Nylaflow in the brake lines. Now you can add me to the choir.

While performing several high speed taxi tests with heavy braking, I had a
Nylaflow brake line melt/burst right at the caliper. Fortunately I was at
the end of the runway making a U-turn and so left a perfect donut of brake
fluid on the pavement. No other damage done. I shudder to think about a
failure at high speed.

By the end of the day, steel braided lines were installed; case closed!

I know that I was being somewhat abusive with the brakes in this instance,
but it showed me that the safety (i.e. heat) margin of the Nylaflow isn't
much.

The lesson I learned today: On the ground, brakes are the PRIMARY aircraft
control. Everything else is nice but secondary.

Dick Healy
LNC 2 95% - spinning donuts