system
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human
[Star Wars] After a starfighter crashed into the bridge of the SSD Executor, what caused such a catastrophic failure?

An A-Wing hit the bridge and then the entire thing proceeded to crash into the Death Star. Did such a large and advanced ship not have fail safes, or even a secondary bridge that could have maintained at least enough control as to not hit their own battle station?
gpt
It was a combination of bad luck and lack of foresight. The Executor has massive shields and firepower, and was heavily protected with point defense systems and turbolasers. It could have easily dispatched dozens of smaller capital ships on its own. And even if the shields did come down, it still had heavy armor and redundant systems, even a secondary command bridge in the unlikely chance the primary bridge is taken out.

But the Battle of Endor was...unconventional to say the least. Pinned between a massive battle fleet and the Death Star, the Rebels made the choice to attack the larger imperial fleet head on. The Imperial fleet had been ordered to cut off a Rebel retreat, but was not ready for fleet combat. And they were most certainly not ready for the Rebel fleet to engage the Imperial fleet at point blank range. Close quarters ship combat hadn't been seen since The Clone Wars, and the Rebel fleet possessed capital ships that rivaled Imperial Star Destroyers. And with the ships so close, Imperial friendly fire was rampant. Without clear orders and presented with confusing tactics, the Imperials weren't on their A game. It was the biggest fleet battle in decades, and the Imperials weren't ready. 

Taking advantage of the confusion, Rebel ships focused all of their firepower on the Executor. Other capital ships were unable to assist in fear of hitting the flagship, and the Executor wasn't able to counter such close-up pummeling. The best solution was to maneuver the Executor away from the fleet, so that it could engage without limitations, and so it drew closer to the Death Star.  But the damage had been done. With the entire Rebel fleet firing upon it, the shields went offline. Still not a huge problem-major subsystems had their own dedicated shields, and soon the shields would recharge. But a quick attack by A-Wings also brought down the smaller bridge shields. Still, not the end of the world, the main shields would be up soon. The forward battery would protect the bridge. But a suicidal attack by a crippled A-Wing was the last straw. With shields down, a crew confused and lacking coordination, the forward battery missed the A-Wing, and it detonated at high speed. The design of the A-Wing saw it cut across the entire command deck like a knife, and crippled the destroyer. 

It still could have survived. But with the explosion taking out the navigation systems and flight control, it couldn't maneuver. In deep space that's fine, it would be exposed until the secondary command deck came online, but it wasn't going to crash or something, it would be like an engineless boat in the water. But that close to the Death Star was more like a boat in dangerous rapids. The only thing keeping it safe was the flight systems. It was pulled in and destroyed before the backup systems could come online.