Maintenance economics
The standard Annual for a SEP is about 40 hours.
That's about 1 man-week.
This is normally charged out at £2500+VAT.
The cost of employing the bloke for that week is about £500.
So the maintenance company should be making loads of £££££.
If you can get say four planes in your hangar, that's £8000 of contribution towards your fixed costs, per week.
Yet most aren't (or apparently aren't). Why aren't they?
Is it because many/most are disorganised and spent too much time waiting for parts, with the plane sitting in their hangar? (IOW, under-utilisation of assets resulting from poor project management.)
In some cases it may be due to non-chargeable work but, from what I have seen, all extras go on top of the 2.5k under the heading of "defects and ADs". This should be minimal on a new plane but on a 30 year old one it could add a few k.