The photos beg a few questions for sure!
I sure hope the FAA/NTSB do a stress crack failure analysis on the broken bits to determine the propagation of the failure......review maintenance records and historical data for the part, chase down the lot number of the item and do an AD requiring an immediate one time inspection of all related parts. That being said....I would hope Engineers world wide would be doing it on their own as a precautionary measure.
Was there any indication of a problem seen during the maintenance action, daily inspection, or preflight?
Any history of incidents or accidents involving that part? Was there a metallurgical failure, manufacting fault, casting problem?
Big chunks of metal just do not break like that without there being a "real" cause that can be found if properly investigated?
Hand salute to the pilot for getting the aircraft down safely!
It would be nice to hear his account of the flight and the technique he used to accomplish the landing.....as it would be a very good learning tool for the rest of us.