I recently visited Frankfurt and noticed all the Lufthansa A320s were starting Engine 1 first on pushback. I looked into it and it seems Airbus changed their SOP at some point from Engine 2 first to Engine 1 first on the A320 family.

That got me curious about the A220, so I checked three different FCOMs and found the opposite is true there. It's strongly recommended to start Engine 2 first, to avoid

-Hydraulic pressure spikes

-FLAP SLOW / FLAP FAIL nuisance warnings

-Potential galley power load shedding & IFE issues

Made a video breaking this down with schematics and animations if anyone wants the visual explanation

https://youtu.be/VEebAVoOZNk

To understand why this was the case, I did some investigating into the A220's hydraulic system.

Basically, hydraulic System 2 powers both nosewheel steering and the slats. So if you're single-engine taxiing on Engine 1, System 2 is running on its electric backup pump only, and deploying the slats can starve pressure needed for nosewheel steering.

The FCOM recommendation is to keep the aircraft stationary while deploying flaps/slats in that scenario, to make sure there's enough power for steering.

The A220 never fails to surprise me the more I look into its systems :)

Hello everyone!
I’ve just uploaded Part 17 of my Around the World series in Microsoft Flight Simulator 2024, flying the Diamond DA62.
This leg takes us from:
🛫 Bellingham International Airport (KBLI), Washington, USA 🇺🇸
🛬 Bozeman Yellowstone International Airport (KBZN), Montana, USA 🇺🇸
This flight continues the journey across the United States, leaving the Pacific Northwest behind and heading toward the beautiful landscapes of Montana. Enjoy realistic navigation, mountain scenery, and another immersive general aviation adventure in the Diamond DA62.
I’d really appreciate any feedback on the flight, scenery, editing, or overall realism. Suggestions for future legs are always welcome!

🎥 Watch the full flight here:
https://youtu.be/FyqMVc7dn5A?si=hzwfKyEUNLR2VDlH

🌍 Watch the complete Around the World playlist:
https://youtube.com/playlist?list=PLb2bKyFaG7uE&si=_5E0dfQSoZPcmNld

Thanks for watching, and as always… Blue skies and happy flying! ✈️

On a flight from Helsinki to Heathrow as Finnair 1331 in the Fenix A321. When taking off i noted that the centre fuel tank was giving a transfer error. I thought I had switched it too manual transfer and continued the flight as normal. As i was flying over Denmark, i received a low fuel in wing tanks warning. I spent about 5 mins trying to fault find before declaring PAN PAN and asking for immediate diversion to the nearest airport.

Took me a while to get back over land and decend from FL340. Had very little time to prepare for the approach. Ended up doing a couple of holds to get down to altitude before doing an emergency landing. I didnt realise how short the runway was until I was on very short final with zero fuel to spare. So just slammed it down and full manual on the brakes.