On 1/28/2010 8:27 AM, pilotmac818 wrote: > ...the header tank would occasionally show fuel bubbles in the glass tube in > level flight but the problem would get worse during landing and takeoff when > fuel leaked out of the gauge. On the last leg of the flight the top blew off > the glass tube while in level flight. > Let me suggest an alternate scenario.
The header tank sight gauge is in a low pressure area caused by the airflow accelerating over the windscreen. If the sight tube has any kind of a leak, most often caused by cracking of the plastic cap, it will draw fuel and air from the tank up into the sight tube, causing the bubbling and leakage. When the cap finally failed, it was sucked off the glass tube, rather than blown off. Call Mike back and ask for a new plastic cap. Secure it to the glass tube with a drop of 5 minute epoxy and you should be good to go for another 5 years or so. John
