February 27Feb 27 The Airbus A300B4—Airbus's very first widebody and twin engine —looks and flies like a time capsule from the classic era... yet peek inside its cockpit, and you'll spot unmistakable echoes of Concorde. Those familiar AC/DC electrical gauges, the layout of certain hydraulic indicators, even AFCS modes like ALT ACQ—they share more DNA than you'd ever expect from a subsonic workhorse and the supersonic queen of the skies. Here are some of the most interesting procedural quirks that make the A300B4-200 stand out. I've captured most of them in a full flight video using these techniques—linked below. I'm still learning the jet myself, but these details really bring its character to life. https://youtu.be/G9dlTQ_xiZs?si=M9Z4Wyozkpbk2yFO Engine Start, Air Bleed Logic & Packs A typical A300 start begins by closing both pack valves using CLOSE RESET. This isn’t a purely procedural formality: on the A300 the packs can back-feed contaminants into the air-conditioning system during engine start, so Airbus insisted on isolating them to keep the cabin supply clean. Flight Controls & Hydraulics Behaviour A quirk worth noting during the flight-controls check is that if you move more than one axis simultaneously you may momentarily see hydraulic PRESS LO indications. This isn’t a failure — each axis draws heavily from its system, so the aircraft briefly “complains” before pressures stabilise again. Centre Tank Takeoff Limitations Fuel management on the A300B4 is more procedural than automated. Before takeoff, the center tank pumps must MANUALLY selected to be OFF, and Airbus is explicit that takeoff is prohibited with the centre tank feeding the engines. Takeoff Roll – The Nosewheel Shimmy Trait During your A300 takeoff rolls, you may notice nosewheel shimmy. If it appears, the remedy is simple: release forward pressure and introduce light aft pressure on the column. As the weight lifts off the nose, the vibration fades. Landing Gear Retraction – Neutral Position Limits The notable A300 nuance is the neutral detent: it should only be selected below 270 knots. Automatic Fuel Transfer As cruise progresses and the center tank empties, the A300 begins a semi-automated sequence that hints at later Airbus design ideas. When the center tank fuel is gone: • the centre tank pumps switch off automatically, • the centre shutoff valves close, • and Tanks 1 and 2 pumps switch on. Although this is an automated sequence, the crew is expected to confirm the logic Only the inboard tanks should decrease afterwards; the outboards remain untouched to maintain wing bending relief. When the inboards run dry, pumps correctly show amber with PRESS LO arrows, at which point the crew turns those pumps off. Fuel Leak Discipline - ETOPS was hard on twinjets... Airbus insisted on a check at every waypoint (or every 30 minutes): Fuel on board + fuel used should equal departure fuel. If the difference is abnormally small, a leak is suspected. This check is mandatory before executing any fuel imbalance procedure. Landing, APU Operation & Battery Logic Before or after landing the APU can be started as needed, but do not start it on short final. Importantly, batteries must be switched ON before starting the APU. The batteries act as electrical buffers, absorbing transients. After the APU stabilises, the batteries can be set back to NORM. Parking Brake System – A300B4’s Hydraulics The parking brakes on the A300B4-200 belong to a dedicated branch of the yellow hydraulic system, powered by Engine 2. The A300 uses an AC-driven electric pump to pressurise the brake accumulator. Once 3000psi is attained, around 10 hours of parking brake is provided. It’s a similar logic seen in aircraft like the Bae-146. Conclusion Hope you found this breakdown useful — the A300 really rewards learning its systems properly, and I’ve enjoyed digging into how it behaves. What were your own A300 experiences like in the sim? Any quirks or moments that stood out? Cheers, Joshua757 Aeronautical Engineering First Class Graduate and Flightsimmer.
February 27Feb 27 Really nice to read 🙏 Flying gliders since 1980 Flightsimming since 1992 AMD Ryzen 5600x, 32GB RAM, GPU Nvidia RTX 3060 Ti 8 GB, 1 TB and 500 GB nvme2 SSD drives, HP 27" 60Hz LED monitor @ 1920x1080, T16000, Hotas from old X52 Pro, Saitek Combat Rudder Pro (2010 model)
February 27Feb 27 Very interesting! I fly the a300-600 and some things kinda still apply. The nosewheel will shimmy (or bump aloooot) when you taxispeed is around ~13-17kts. Either you stay below, or go above! Regarding the hydraulic, we will always start engine 2 first, and shut down nr 1 first for the same reason as you mentioned. Good fun!
February 27Feb 27 Author 20 minutes ago, jcomm said: Really nice to read 🙏 Glad you enjoyed the read 📚
February 27Feb 27 Author 13 minutes ago, EnSnellHest said: Very interesting! I fly the a300-600 and some things kinda still apply. The nosewheel will shimmy (or bump aloooot) when you taxispeed is around ~13-17kts. Either you stay below, or go above! Regarding the hydraulic, we will always start engine 2 first, and shut down nr 1 first for the same reason as you mentioned. Good fun! Nice! Good to hear you're enjoying the A300-600. I've had the privilege of seeing these in real life at EGNX.
February 27Feb 27 Very nice write-up, @Joshua757. Thanks. I've been always very fond of the A300 model and its variations, and its history, the one that put Airbus on the Map. In FSX, I was often flying the SimCheck A300 (believe a B4), Cold & Dark. It was good fun. I am aware that an A300-600 is available in MSFS, but have never got to it, might, after reading your post. I do fly the (free) iniBuilds A310 from time to time.
February 28Feb 28 Author 6 hours ago, P_7878 said: Very nice write-up, @Joshua757. Thanks. I've been always very fond of the A300 model and its variations, and its history, the one that put Airbus on the Map. In FSX, I was often flying the SimCheck A300 (believe a B4), Cold & Dark. It was good fun. I am aware that an A300-600 is available in MSFS, but have never got to it, might, after reading your post. I do fly the (free) iniBuilds A310 from time to time. Thankyou 🙂Glad you're enjoying the free A310. The ini A300 has a slightly nicer EFB. 🙂
February 28Feb 28 Author 23 hours ago, P_7878 said: Very nice write-up, @Joshua757. Thanks. I've been always very fond of the A300 model and its variations, and its history, the one that put Airbus on the Map. In FSX, I was often flying the SimCheck A300 (believe a B4), Cold & Dark. It was good fun. I am aware that an A300-600 is available in MSFS, but have never got to it, might, after reading your post. I do fly the (free) iniBuilds A310 from time to time. Do let me know how it goes it you get the msfs a300 😉
February 28Feb 28 Author On 2/28/2026 at 12:29 AM, EnSnellHest said: Very interesting! I fly the a300-600 and some things kinda still apply. The nosewheel will shimmy (or bump aloooot) when you taxispeed is around ~13-17kts. Either you stay below, or go above! Regarding the hydraulic, we will always start engine 2 first, and shut down nr 1 first for the same reason as you mentioned. Good fun! I've not flown the A300 600 long enough to observe the fuel management. Compared to the A300B4-200, is it full automated or do you need to manually turn the centre pumps off ?
February 28Feb 28 2 hours ago, Joshua757 said: Do let me know how it goes it you get the msfs a300 😉 @Joshua757 I've a couple of other (classic) airliner choices that I'm also thinking of such as the Just Flight BAe 146/Avro RJ and the FSS 727. I wish I had more time but will probably get one. Anyway, the (iniBuilds) A300-600 remains in the contention ...while the (free) A310-300 partially serves the purpose of this operator, for the time being...🙂... Cheers...!
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