Mark Jones wrote: > Water is not the issue. My tanks were filled with 100LL after the rebuild. > My first flight after the rebuild was thirty minutes with a hiccup at 4000' > in level flight approximately 15 minutes into the flight. The second flight > was for 1.5 hours and had no problems. The flight yesterday was for 1/2 hour > with three hiccups total. These hiccups are as if someont turned off the > ignition for a half second each time. > > Hi Mark, Don't like to labour the point, the fact that you have added fuel is irrelevant, if the tank stood 3/4 empty for some weeks there could still be water in the bottom, unless you drained it completely...
have a read of http://www.aaib.dft.gov.uk/cms_resources/Robinson%20R44%20Astro,%20G-HEPY%2005-06.pdf http://www.aaib.dft.gov.uk/cms_resources/Skyranger%20912S(1),%20G-PSKY%2007-06.pdf I could find lots more accident reports where water in the fuel caused an engine stop, it's probably the second most common cause of in flight engine stopages ( carb ice being number 1 ), If it is indeed ignition related, what have you changed recently ? As an aside, single ignition systems are illegal on all aircraft except motor-gliders and microlights - just not reliable enough. Good luck with figuring out what's going wrong. Pete
