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Following up on my earlier report about the electrical bus assignment logic, I have now done a more detailed test series on the Avro RJ, specifically comparing Channel 1 loss (GEN 1 failure) against Channel 2 loss (GEN 4 failure) with both Bus-Tie switches set to OPEN and the APU shut down. The purpose of the two-channel electrical system is redundancy: a single channel failure should never leave the crew without instruments or communications. Each side of the cockpit should be independently powered so that either failure is survivable with roughly equal levels of degradation. TEST CONFIGURATION (both tests): Engines 1 and 4 running APU OFF Bus-Tie AC: OPEN Bus-Tie DC: OPEN TEST 1 – GEN 4 OFF/RESET (Channel 2 lost) Overhead panel annunciators: ANTI SKID INOP L INNER LO PRESS / R OUTER LO PRESS DC BUS 2 OFF / AC BUS 2 OFF GEN 4 OFF LINE R PITOT HTR FAIL MWP captions: ANTI SKID FUEL ICE PROT ELECT Flight deck effects: Right EADI: OFF Right EHSI: still running Right altimeter: OFF Right clock: OFF Right VHF NAV: OFF Right FMC: OFF DME 2: OFF Left side: no failures, fully operational This result is largely correct. Channel 2 loss affects the right side of the cockpit, while the left side remains fully operational. The captain retains full instrumentation to continue flying. TEST 2 – GEN 1 OFF/RESET (Channel 1 lost) Overhead panel annunciators: L OUTER LO PRESS / R INNER LO PRESS DC BUS 1 OFF / AC BUS 1 OFF ESS AC OFF / ESS DC OFF INTAKE 1-4 LO PRESS (with engine anti-ice selected) AUX PITOT HTR FAIL L PITOT HTR FAIL R VANE HTR FAIL RECIRC VALVE MWP captions: ICE PROT FUEL ELECT SCRN HEAT SEL OFF FLT REC OFF ENG A-ICE ON (anti-ice valves fail-safe open due to loss of solenoid power) AIR CON Flight deck effects: Left EADI: OFF Left EHSI: OFF Left altimeter: OFF Left clock: OFF Left FMC: OFF Left TCAS: OFF Right EADI: OFF Right EHSI: OFF Right TCAS: OFF Thrust computer: OFF Upper and lower engine indicator rows: OFF YD: red light EL TRIM: red light With GEN 1 loss, both sides of the cockpit are effectively dead. The crew loses all primary flight instruments, important engine indications, and the thrust computer. This is not survivable in the same way as a Channel 2 failure. Expected Behaviour (per FCOM) The whole point of having two independent channels is that a single channel failure should never leave the crew without instruments or communications. Per the FCOM: Left ADI is powered by 26V ESS AC (Channel 1) Right ADI is powered by 26V AC 2 (Channel 2) DME 1 is powered by ESS AC / ESS DC (Channel 1) DME 2 is powered by AC 2 / DC 2 (Channel 2) Avionics Master 1 controls: left instruments, VOR 1, ILS 1, DME 1, FMS 1, weather radar, GPWS, CVR, FDR, left TCAS, DFGS 1 Avionics Master 2 controls: right instruments, VOR 2, ILS 2, DME 2, FMS 2, right TCAS, DFGS 2 With a Channel 1 failure, the RIGHT side instruments (right EADI, right EHSI, right TCAS) should all remain operational on Channel 2. In the sim, they all fail, indicating that most equipment is wired to Channel 1. Additional item – BATT NO CHARGE 7-second delay Per the FCOM (Avro Electrical, Chapter 8, Topic 11), the BATT NO CHARGE annunciator has a built-in 7-second delay from fault detection to illumination. In the sim, the annunciator appears to illuminate immediately when the charging condition is lost. This is a minor point but worth noting for completeness. Since the failure logic itself is already working correctly (systems do fail when their assigned bus is lost), the fix is most likely a matter of reassigning individual services from Channel 1 to Channel 2 in the configuration, rather than requiring new logic or code.

@Black-Square I would LOVE to see the G3X with the GNS 750 with a modern Autopilot option. I know there is a huge group of simmers that prefer the steam gauges, but I think there are as many who prefer the glass cockpits and for some reason the best mod builders always seem to stick with the old stuff. The touchscreen aspect of the G3X is really helpful, especially in VR. An option would be great! By the way the Bonanza A36TC is my favorite plane. I would love it even more with a G3X!

WORKING FINE NOW

Thanks for your reply. That’s understood fully. There are a few aircraft on the market place on Xbox that allow if you press jettison it removes the we[on from the payload which is a little more immersive. So not specifically seeing the weapon drop but as close as we can get etc. would this be possible for the marketplace versions at some point? The aircraft that allow this are the IFE aircraft. Sorry for name dropping another developer but it adds to the immersion that big extra. Cheers Rg

Just to give this topic some closure, support advised me to disable addons and then it worked so I started to exclude things individually and the problem is caused by GSX, specifically when you have passengers enabled in GSX! There is this phantom passenger light that sticks to the plane at all points. Seems to be a common problem with certain planes when researching this very issue so not sure if this is a GSX issue to fix or an aircraft dev but I can live with not having any pax so I'll consider the problem resolved.

What makes you think that?

@KarsPilot If you contact Just Flight about this we will be happy to discuss: https://www.justflight.com/contact-us

This isn't something I recall seeing reported before; however, if it is hydraulic-related, the HYD.1 or HYD.2 caption would be illuminated on the CWP. HYD.1 system pressure will vary depending on usage, but should automatically increase pressure once the load on the system is reduced. HYD.2 system requires resetting after engine start via the "HYD 2 RESET" button on the left console. In any case, could I kindly ask you to raise a ticket with Just Flight support at the following link: https://www.justflight.com/support In the ticket, if you would be able to provide any screenshots/videos of the behaviour, as well as steps on how we can replicate the behaviour, then that will put our support team in the best position to offer assistance. Mark - Just Flight

@Mark Thanks a lot! It would really be appreciated! As of now, my PA28-161 is grounded until this has been fixed. Which is a real shame given that everything else about this product is great

Hmm the integration of the GPS 100 is still causes a bit of confusion. I'm in MSFS 2024 Even after creating the flight plan on the world map, it will only navigate to the first waypoint. After that it continuously tracks away from it, instead of to the next waypoint. The only way I've been able to change the navigation mid flight, is by using the PMS50 750 plugin to do a direct to to the next waypoint and then GPS100 will update. But this method defeats the purpose of the GPS100.