Possibly not the place to say this – but I’ve known quite a few planes returned to hangar by Line after a check, (not all companies would allow this) so having just had a check doesn’t rule anything out.
In fact in some places (not only in Africa) watching some people trying to find all their tools after a plane has gone can be scary but fun.
Especially scary if your the one who can't find something.
One interesting point is we seem often to get “pilot error” / “maintenance fault” / weather etc as causes (sometimes the cause – sometimes contributory) rarely “Company policy”.
NOT saying anything about this crash – just general comments.
On this one I will say the Nigerians should get NTSB involved big time – hope they do.