The gears in question are right in the middle, so there's not a lot of scope to replace them with anything else. But I did find a solution.

Its dimensions are identical to the Control+ hub and it uses the same 6 AA battery 'cassette'. There are two outputs and two independent switches which can be operated via a pin hole at the top or an axle hole on the side. There is nothing stopping you from trying to move the wheels, doors or engines beyond their limits, although there are some safety mechanisms built in. Asking so much money for some plastic toys is reasonable if a big chunk of earnings is going to marketing, focus groups, advisers, quality control. The rear ramp is quite a complicated mechanism driven by a small actuator. What makes it remarkable is that it consists of two halves of different sizes. They also move at different speeds.

Construction

V-22 Osprey model fills the gap: here comes a simple hub with two ports and two physical switches. The new simple hub has no sensors onboard and no Bluetooth support, so you can’t control it using a smart device. From a functional standpoint, the smart hub is similar to a combination of the Power Function regular battery box and an IR receiver, while the new simple hub is practically just a battery box with two switches. Physically, both hubs are identical. However, the simple one has only two ports and a LED indicator instead of a button on top. However, the gearbox contains a serious design flaw, the likes of which we've never encountered in a Technic model before. I've managed to break it within a few hours of building it. If the mechanisms are kept within their limits and operated in a particular way, they operate fairly well, but it's all too easy to strain the motor and break the gears. The hop half of the fuselage houses the motor and gearbox, which directs motor output to one (or more) of four operations. This could be the REAL reason it was recalled and that Lego decided (2 weeks prior to release) to use the military connotations as an excuse to hide the real truth. I find it hard to see why this was the reason - Lego have a history of themed sets with military connotations as well as other 'adult' themes - James Bond uses guns and sleeps with women and still the DB5 was released. I would laugh if Lego admitted it was the fault in the set as a reason to recall and that they would 're-release' the set with Lego supplying the parts to remedy the problem.

They didn't sent in advance one set to their trusted (and sometimes too defending reviewers), and they were so naive to not see coming the fact that @Huw , Sariel and others will spend time and crazy money to get in the end a set because this is their passion.The way the gearbox has been designed makes it possible to channel power to all four movements at once, although everything pretty much grinds to a halt if you do so. It's prototypical to tilt the engines forwards once the blades are spinning and it's certainly possible to do that, but the motor strains a bit.

Around 400 of the craft have been produced since 1988 and it's currently in use by the US military and the Japanese self-defence force.

Thankfully, it's relatively easy to get the gearbox out of the aircraft to work on it. You can see the mangled gears underneath. However, I still think that, to avoid damage again, the motor should be switched on before engaging the gearbox to turn the rotors. Whatever the reason, you'd have thought it would have become apparent much earlier in its design lifecycle. No because all of the other components for the main functions, namely gears and the L-motor, have all been released in other sets, and there are ways to get around the requirement for the new dumb battery box.

The lower one on the other side raises and lowers the wheels, which when retracted, fit neatly into the body.

What I didn’t expect to see is functioning flaps on both wings. An ingenious linkage let the flaps move up and down in sync with the engines. Usually, designing flaps for a LEGO aircraft model is a trivial task. Still, it is nearly impossible to motorize them as they are thin and relatively small compared to the wings’ size. Kudos to the designers of the set who saw an opportunity and took it. There is one more flap on the tail of the aircraft, but it can only be engaged manually using an improvised switch on the top of the rear part. Think of it like a car. Let's say a wing mirror was prone to lopsided but can be an easily fixed with manufacturer supplied parts. No recall required. HOWEVER, if a car was liable to lose control at certain speeds cos of a problem in the suspension then it would need to be recalled for obvious reasons The LEGO Technic Bell Boeing V-22 Osprey was designed to highlight the important role the aircraft plays in search and rescue efforts. While the set clearly depicts how a rescue version of the plane might look, the aircraft is only used by the military.?We have a long-standing policy not to create sets which feature real military vehicles, so it has been decided not to proceed with the launch of this product. What this list has: All of the parts remain after the Orange and DBG parts in list 2 and 3 above are deleted. It turns out that adding a second set of three gears is actually much simpler. Rather than have one set of gears surrounded by two 3l beams in the middle of the gearbox, why not have 2 sets of gears with one beam between them, like this: