Board Thread:Naruto Discussions/@comment-1018594-20140911053856/@comment-9782468-20140911214105

Elveonora wrote: The incarnates not only have Ashura and Indra's chakra but their own as well. You know, children inherit chakra from their parents. I'm sure Naruto's chakra was stated to be similar to Minato's.

Ignoring Edo Tensei psychic (which revives people with the power they had thorough life), Rinne Tensei revived Madara no longer had Ashura or Indra's chakra. That in my opinion is why his Rinnegan crumbled. He again regained Ashura and Indra's chakras by plugging the eyes into his sockets later.

Actually, his eyes crumbles because they were the fake eyes created by Edo Tensei. So when he was fully revived, the fake ones crumbled. His original eyes were given to Nagato, and those were the real eyes. Madara just needed them back.