<html><head></head><body><div class="yahoo-style-wrap" style="font-family:verdana, helvetica, sans-serif;font-size:16px;"><div dir="ltr" data-setdir="false">Hi,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I have 2 planes with that ECS. The primary has 300 flights, the backup had 100 flights since the installation of that ESC.</div><div dir="ltr" data-setdir="false">Both planes use the BEC at 6.2V and a backup 2S lipo with a radio south regulator at 5.7V.<br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Getting ready for a 3rd flight on the backup yesterday, the ECS made sparks and smoke when I connected the battery. I took the ECS apart and found what I think is a FET busted.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">2 observations: I accidentally left the backup battery and BEC switches ON after the 2nd flight about 10 minutes before and only noticed it after I connected the main battery. I may have touch the connectors twice in quick successions when connecting the battery.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I usually turn the backup battery ON first to check the voltage to the receiver and then the BEC.<br></div><div><br></div><div dir="ltr" data-setdir="false"><span></span>See pictures in that album:<a href="https://photos.app.goo.gl/gaN4bqG9BCgDyUzt8" rel="nofollow" target="_blank" class=""> </a><a href="https://photos.app.goo.gl/gaN4bqG9BCgDyUzt8" rel="nofollow" target="_blank">https://photos.app.goo.gl/gaN4bqG9BCgDyUzt8</a></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><div><div dir="ltr" data-setdir="false"><span>Since I have the same ECS on the other plane, I want to understand what caused it and if I did something wrong.</span></div></div><div><br></div><div dir="ltr" data-setdir="false">Abt idea what happened ?<br></div><div><br></div><div>Could it be repaired or is it done ?</div></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thanks you</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Xavier<br></div><div><br></div><div><br></div></div></body></html>