Without any basis of fact I, like everyone else, is "assuming" that this is a weather related incident. Specifically, a possible inadvertent cell penetration.
So here's my pet peeve regarding the serviceability of weather radar.
Most MEL's allows for the weather radar to be unserviceable for 10 days (Category C) albeit with certain exceptions. These exceptions are open to interpretation.
And as we know, whenever there are commercial pressures, interpretation of any exceptions pertaining to safety never ends well for the crews.
The MEL for Radar needs to be changed to Category A. And the exceptions tightened up to minimize a "relaxed" interpretation for commercial reasons.
The thing that really angers me is that in contrast, the CVR, which does absolutely nothing for the immediate safety of the aircraft in which it's installed is allowed to be unserviceable for only 3 days.
Every MEL I have flown under adds to the above that the MEL may only be used if there is zero chance of convective weather along the route of flight. I think a 10 day MEL with the above restriction is reasonable.