Hi Leendert !
Thank you very much for your response. Although Alcazba mountain is definitely very near by, the parts I found lay indeed on a Mt. Mulhacen slope. Also the insignia of the jacket should be of a USAAF crew I suppose.
btw, here is a good site for aircraft accidents:
http://aviation-safety.net/database/country/
Another guess is USAF Douglas C-124C Globemaster II serial 52-0980 that crashed 12. February 1966 into Sierra Nevada, but strangely "near San Javier" is given as crash site, which is NOT Sierra Nevada area.
Thanks again, FrankieS