tag:blogger.com,1999:blog-10000144.post7394331982278105309..comments2024-03-13T09:47:40.487+00:00Comments on Cockpit Conversation: Skill Testing QuestionAviatrixhttp://www.blogger.com/profile/13634111275860140084noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-10000144.post-38638411892463004202008-11-02T01:24:00.000+00:002008-11-02T01:24:00.000+00:00there's no way the CHT would fall to 150 deg no ma...<I> there's no way the CHT would fall to 150 deg no matter how the cowl flaps were set -- at least not until a couple of hours after you shut off the engine on the ground.</I><BR/><BR/>Not true, a dead cylinder, even on an otherwise running engine will cool very rapidly. I've seen it many timesAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-34513703585269496782008-11-02T01:21:00.000+00:002008-11-02T01:21:00.000+00:00>>>>>>The first power reduction ...<I> >>>>>>The first power reduction is the most common time for a failure.</I><BR/><BR/><BR/>Has anyone ever seen any kind of statistics which suggest that this is true? <BR/><BR/>I certainly haven't, and I can't fathom a mechanical reason this would be true, and while I've expereinced more engine failures than most modern pilots (you get that flying airplanes with 4 radial engines) neither I nor anyone I know has had a power failure while doing the initial power reduction. <BR/><BR/>Personally, I tend to think that this an old wives tale, made up by some instructor who was trying to break a student of reducing power immediately after liftoff, and it's just been repeated so many times that everyone "knows" it is "true". I'm certainly willing to modify that if somone can poiunt me to statistics which suggest that it true though.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-74927230233493930252008-11-02T01:20:00.000+00:002008-11-02T01:20:00.000+00:00// I'm flying through a bit of turbulence and the ...// I'm flying through a bit of turbulence and the right engine does surge//<BR/><BR/>Loose ignition cable on a spark plug?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-57586274956917027352008-11-01T23:32:00.000+00:002008-11-01T23:32:00.000+00:00Does your company think that its worth while to in...Does your company think that its worth while to invest in an engine analyzer (EGT & CHT on each cylinder)? The price, versus repairing damage from running continuously with a subtle problem, is justified. I just put one into my single engine piston airplane and am quite pleased.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-67001880377860824952008-11-01T22:51:00.000+00:002008-11-01T22:51:00.000+00:00Your water bottle knocked the probe out?Your water bottle knocked the probe out?dpiercehttps://www.blogger.com/profile/03397601206317363858noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-8180275093323494682008-11-01T21:33:00.000+00:002008-11-01T21:33:00.000+00:00I think the cowl flap did not close after you leve...I think the cowl flap did not close after you leveled off. I think that would explain the drop in temps in cruise, but normal temps on the ground. I'm guessing the fix was simple - reattach the cable to the cowl flap door.Wild Bluehttps://www.blogger.com/profile/09824040710162044229noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-8486035445844542172008-11-01T17:06:00.000+00:002008-11-01T17:06:00.000+00:00Something caused the fire to go out or partially o...Something caused the fire to go out or partially out in the cylinder monitored by CHT... and that would also explain the loss of "a couple of inches of MP..."<BR/><BR/>So - is it fuel/air or spark...<BR/><BR/>If the engine has surged before, maybe a sticking valve? Or a plug problem as someone already suggested?<BR/><BR/>I once retrieved a renter-abandoned C-177RG through the Rockies (he was trapped by bad weather and took the bus home). All seemed normal (I was lightly loaded). I was informed by the mechanic who did the now-due 100 hour inspection that one of the cylinders had almost no compression due to a burnt valve (renter over-leaning?). Live and learn ...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-46523312037256555772008-11-01T12:51:00.000+00:002008-11-01T12:51:00.000+00:00You've got me, Aviatrix. Even if the cylinder tha...You've got me, Aviatrix. Even if the cylinder that has the CHT probe failed completely, there's no way the CHT would fall to 150 deg no matter how the cowl flaps were set -- at least not until a couple of hours after you shut off the engine on the ground. <BR/><BR/>I thought your initial explanation of a loose probe bundle was the best one, but I don't know what it would be different on the ground. I'm looking forward to hearing what it actually was.davidhttps://www.blogger.com/profile/15194758376900990105noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-56530212165405542562008-11-01T07:13:00.000+00:002008-11-01T07:13:00.000+00:00Something happened to the cowl flap?Something happened to the cowl flap?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-8788494232975605282008-11-01T05:03:00.000+00:002008-11-01T05:03:00.000+00:00fouled plugs?fouled plugs?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-16704223912949890472008-11-01T03:46:00.000+00:002008-11-01T03:46:00.000+00:00funny thing- I to had my skills tested today. I'm ...funny thing- I to had my skills tested today. I'm a very low time pilot in a rented plane. This morning I helped put the cowling back on the 172 after it's annual, then took off for a 70 mile jaunt to pick up some family and return home... basically a hop to add time. Anyhow, completed climb, leveled off and tried to lean the mixture. Brand new mixture cable was broken.... Nope not really a big deal but was still a new and funny thing. <BR/><BR/>Keep writing-- I found your blog quite a while back and love reading it... to the point of disappointed when a day is missed. I know your busy but I enjoy reading about your day <BR/><BR/>ShaneAnonymousnoreply@blogger.com