John Plant
Analyst · TD Cowen
So we don't have, what I call, customer dedicated plants, more product focused. So we deliver to multiple customers from most of our plants. In the case of fasteners. Some are a little bit more wide-body narrow-body focused. And so that mix can make a big difference. So if you wind the clock back, a year, 18 months, where the -- I mean, essentially 787 was halted. I mean you could say, well, one a month, but I mean it wasn't really one a month. And I remember I'll say, I think Q4 '22, essentially or Q1 of '23, we were only producing the [ metallic ] fasteners. As that was having a negative effect on us because we had 2 or 3 plants which were grossly underloaded because the equipment required to make the fasteners going a composite aircraft is different to those on the metallic aircraft. So that was both the, I'll say, an idea in terms of both, I'll say, the mix and also the exposure that we had on plants. And obviously, we got massive on recovered fixed cost, that's a problem.
And obviously, we've been moving through that well, and that's why you've got some part of the margin rate improvement that we have in our fasteners business. It's only part of it, as I think I described many other things in it.
For the most part, elsewhere, I mean, there are flavors across our engine business, pretesentially, again, like our core making facilities, they don't really know, what type of aircraft they go to or what customer they go to. It does matter what type of material are used in those cores. And therefore, as you, I think, know, is the core manufacturing has been taking on quite a different completion over the last 2 or 3 years, in terms of the increase in requirements to the ceramic based care.
So I think that probably deals with that and then say, structures wheels, there's no -- again, commentary on that like a wheel is -- just goes to because we control not only the brand, but we can roll the design is that our wheels plants are indifferent to which end markets, which trailer or distribution and need which customer. So that's a good place to be in, not to have customer dedicated plants and the most difficult while we manage is narrow to wide in the fastener business.
Second part of your question was my plans. Well, I can't say I've got any plans, particularly at the moment. I've always said to you as I said that the pleasure of the Board, I've always been wanting to see Howmet through -- I'll call it, the aerospace recovery just that we never quite get to the good recovery part of it yet. So one day, there's going to be a really good time when -- as I talked about in the press, the state of Grace, which I said maybe it will get second half of '24 or early half '25. And it just didn't happen in right now. It's -- I don't think any of us expected the Alaska Airlines incident and the concomitant effect on production and where we are now and also now the 787, so things are not smooth. And that's the case for both Boeing, in particular, but also Airbus. So I'm convinced it will get better. And one day, I'll tell you if I have a plan. How is that?