October 13, 2025Oct 13 Absolutely love twin engine turbo YS-11, but have a stubborn, continuing problem. Fifteen minutes into a flight all avionics are lost, including the HSI. The airspeed indicator, altimeter, vertical speed indicator, flaps and landing gear operate fine and the aircraft flies great. I have gone through the popup checklist over and over, but do not see anything I've missed. Any suggestions? Forever indebted to the late Michael Greenblatt of FSGS.
October 13, 2025Oct 13 Battery or generators? Best regards,Luis Hernández Main rig: self built, AMD Ryzen 7 5700X3D (with SMT off and CO -50 mV), 2x16 GB DDR4-3200 RAM, Nvidia RTX 5060Ti 16GB, 256 GB M.2 SSD (OS+apps) + 2x1 TB SATA III SSD (sims) + 1 TB 7200 rpm HDD (storage), ID-Cooling SE-224-XTS air cooler, Viewsonic VX2458-MHD 1920x1080@120-144 Hz (G-sync compatible), Windows 11. Running P3D v5.4 (with v4.5 scenery objects as an additional library, just in case), FSX-SE, MSFS2020, MSFS2024 and even FS9! Lossless Scaling for all my sims. What a godsend...Mobile rig: ASUS Zenbook UM425QA (AMD Ryzen 7 5800H APU @3.2 GHz and boost disabled, 1 TB M.2 SSD, 16 GB RAM, Windows 11 Pro). Running FS9 there .VKB Gladiator NXT Premium Left + GNX THQ as primary controllers. Xbox Series X|S wireless controller as standby/mobile.
October 13, 2025Oct 13 Author 1 hour ago, Luis Hernandez said: Battery or generators? Tried both--no luck. Forever indebted to the late Michael Greenblatt of FSGS.
October 13, 2025Oct 13 Is your battery discharging all the way though? As in it's not charging off the engines once you start them (generators/alternators)? Rhett 7800X3D ♣ 96 GB G.Skill Flare ♣ Gigabyte 4090 ♣ Crucial P5 Plus 2TB
October 13, 2025Oct 13 Author 47 minutes ago, Mace said: Is your battery discharging all the way though? As in it's not charging off the engines once you start them (generators/alternators)? Will check that. Forever indebted to the late Michael Greenblatt of FSGS.
October 14, 2025Oct 14 You have to reset the generators switches after starting the engines, otherwise you'll remain on battery until they drain out. Cheers, Ed MSFS2020 Steam // Rig: Corsair Graphite 760T Full Tower - ASUS MBoard Maximus XII Hero Z490 - CPU Intel i9-10900K - 64GB RAM - MSI RTX2080 Super 8GB - [1xNVMe M.2 1TB + 1xNVMe M.2 2TB (Samsung)] + [1xSSD 1TB + 1xSSD 2TB (Crucial)] + [1xSSD 1TB (Samsung)] + 1 HDD Seagate 2TB + 1 HDD Seagate External 4TB - Monitor LG 29UC97C UWHD Curved - PSU Corsair RM1000x // Thrustmaster FCS & MS XBOX Controllers
October 14, 2025Oct 14 Author 7 hours ago, edpatino said: You have to reset the generators switches after starting the engines, otherwise you'll remain on battery until they drain out. Yes--that worked!! Too bad that step is not in the checklist. Thanks for the info!! Forever indebted to the late Michael Greenblatt of FSGS.
November 5, 2025Nov 5 Author Even after resetting the generators the battery keeps discharging unless the external power gpu is on. As soon as turn off the gpu and external power switches the batteries start to discharge. Any help? Forever indebted to the late Michael Greenblatt of FSGS.
November 5, 2025Nov 5 Author Also the genertator 1 and 2 fail switches come on. Forever indebted to the late Michael Greenblatt of FSGS.
November 5, 2025Nov 5 Are you sure you're RESETTING the generators after the engines are started? Overhead console I'm not at home to check but make sure the gens are getting reset, and the engines should be running when you do it Another thought: I don't think this aircraft has failures modelled, but if it does, you may have one. Rhett 7800X3D ♣ 96 GB G.Skill Flare ♣ Gigabyte 4090 ♣ Crucial P5 Plus 2TB
November 5, 2025Nov 5 Author If I turn off the battery switch also the elevtric power in the whole aircraft goes off. Forever indebted to the late Michael Greenblatt of FSGS.
November 5, 2025Nov 5 Author Please define what you mean resetting the generators exactly involves. I move them from on to "rest" and then back on. Is that how to do it? Thanks very much for you help Mace. Appreciate it. Forever indebted to the late Michael Greenblatt of FSGS.
November 5, 2025Nov 5 That's correct, I believe...rest back to on...it's on the overhead console. I am not at home otherwise I'd get on there and check. It's also been a week or so since I flew it. Don't turn off the battery though, that's definitely not it. Rhett 7800X3D ♣ 96 GB G.Skill Flare ♣ Gigabyte 4090 ♣ Crucial P5 Plus 2TB
November 5, 2025Nov 5 Author Hello Mace-It is fixed!! There is a discrepancy in the checklist which was causing the battery to run down. Under the "Preliminary Cockpit Preparation" the third entry is "Battery and External Power On." Then in the "After Engine Start" part of the checklist there is another entry that states "Generator & Battery On." So, there are conflicting instructions in the checklist. Having the battery on from the "Preliminary Cockpit Preparation" to the entry "Generator and Battery" on in the "After Engine Start" ran the battery down. If I did not turn on the battery in the "Preliminary Cockpit Preparation" part of the checklist and then turned it on in the "After Engine Start" part of the checklist, turned on the invertors, reset the generators and then shut off the external power, all worked fine. Problem solved. They really need to correct the checklist to keep the battery off until the "After Engine Start" procedure and also add the "reset generators" to the "After Engine Start" part of the checklist. Forever indebted to the late Michael Greenblatt of FSGS.
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