Originally posted by Gabriel
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Air Zimbabwe 767 Engine Surge, Tailpipe Flames, Mayday... Continues to Destination
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Originally posted by ATLcrew View PostNo TIT on that family of aircraft either. In fact, I'm not aware of any jets that display TIT.Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.
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Originally posted by ATLcrew View PostNo TIT on that family of aircraft either. In fact, I'm not aware of any jets that display TIT.
But again, my question is, if you get a continuous (60-90 sec) surge on climb-out with a corresponding EGT redline, and then the surge self-corrects and the indicators return to normal, do you always return or is there a threshold below which it is considered permissible to continue to your destination? I'm asking because a hot start seems to have a shut-down/teardown requirement.
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Originally posted by BoeingBobby View PostI really should have known better!
Now, I realize with pneumatic starters and FADEC and no prop-feather drag, hot starts on turbofans are probably extremely rare, so I'm not surprised if you've never encountered one on a jet aircraft. I also realize that large turbofans are probably designed to be more robust than your typical turboshaft. But there has to be some EGT limit where even a turbofan will require an internal inspection before returning to service. I imagine that limit might also be reached during a full minute or more of recurring engine surge.
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Originally posted by Evan View Post... the danger of compressor damage is that significant after a hot start ...
--- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
--- Defend what you say with arguments, not by imposing your credentials ---
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Originally posted by Evan View PostThe internet really has no idea as to where the limit lies with turbofans, which is why I'm asking the question here on the expertnet, but on turboshaft engines like the PT-6, the internet tells me a hot start often results in a costly hot section inspection before the engine is considered safe to return to service. So, I'm extrapolating: if the danger of compressor damage is that significant after a hot start on a turboshaft, isn't it also present on a large turbofan?
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Originally posted by ATLcrew View PostThe reason you haven't found a definitive answer on the internet is probably because there are too many variables. To wit, for us and our V2500-series engines, the red "tickmark" on the EGT display is OAT-dependent and is not automatically indicative of a hot start. It indicates only that MOC should be contacted. They have a whole set of parameters and limits that they will check against to determine whether a hot start has occurred (or even just an overtemp has occurred).
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