March 18, 20179 yr 1 hour ago, Travon999 said: During the descent I got oil temp warnings for engines 3 and 4 and had to shutdown both of them. I managed to land safely though...but at my origin airport for this last flight, my oil levels were 19. You are not understanding the problem. Your high oil temp is due to low fuel in those tanks and probably has nothing to do with oil levels. Maybe you are not switching to tank to engine mode? Dan Downs KCRP
March 18, 20179 yr Author 10 minutes ago, Captain Kevin said: So don't fly there. Problem solved. 😂😂😂😂agreed! Travon Nicholls Travon Nicholls
March 18, 20179 yr Author 11 minutes ago, downscc said: You are not understanding the problem. Your high oil temp is due to low fuel in those tanks and probably has nothing to do with oil levels. Maybe you are not switching to tank to engine mode? I am switching to Tank/Engine mode though. The fuel levels weren't low. Travon Nicholls
March 19, 20179 yr Quote You are not understanding the problem. Your high oil temp is due to low fuel in those tanks and probably has nothing to do with oil levels. Maybe you are not switching to tank to engine mode? Dan, if the engines are running, I don't see how low fuel quantities would affect oil cooling. Low-ish fuel quantities are only going to affect hydraulic fluid cooling. Cheers JHW John H Watson (retired 744/767 Avionics engineer)
March 19, 20179 yr 42 minutes ago, Qavion2 said: Dan, if the engines are running, I don't see how low fuel quantities would affect oil cooling. Low-ish fuel quantities are only going to affect hydraulic fluid cooling. Cheers JHW Exactly. The oil cooler is supplied by the primary engine fuel line - if THAT runs dry, the engine is going to flame out in any case. I have never worked on the large GE/RR/PW engines used on the 747 - the largest engines I have experience with are the RR BR715 and GE CF34. But on these smaller engines, the fuel/oil cooler has a thermostatic valve to bypass the oil around the cooler when the oil is very cold, (such as when initially starting the engine on a very cold day). I assume the bigger engines use a similar bypass valve. If the valve got stuck in the bypass position when the oil is warm, I could see how that could cause high oil temps. I don't know if the PMDG engine simulation is sufficiently detailed to have that particular failure mode though... Jim BarrettLicensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.
March 19, 20179 yr Well it seems like fun ........ :) Alaa A. RiadJust love to fly............... W11 64-bit, MSFS2020, Intel Core i7-8700 CPU @ 3.20 Ghz 6 Cores, 2 TR HD, 16.0 GB DDR4 RAM, NVIDIA GeForce GTX 1060 6 MB GDDR5
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