justme69.
The way the head of mx would be involved in an AOG would be to organise servicable parts, manpower tooling etc to get the aircraft fixed. it is the responsibility of the engineers to perform the work and release the aircraft to service.
for me they would need to investigate whether spanair mcc, informed the the head of mx about this. i have heard nothing about the role that spanair mcc had to play in this. a return to stand for an a/c for a mx event should be reported to the head of mx.