The crash of EgyptAir flight 804 into the Mediterranean Sea that killed 66 people was caused by a hot Apple product ... according to a new suit. The families of several of the victims of the May 19, 2016 crash claim the tragedy was due to the co-pilot's iPhone 6S or iPad mini overheating in the cockpit and catching fire. According to the docs ... an investigation revealed the device ignited and led to a bigger fire in the cockpit, which ultimately took the plane down. It should be noted, however -- some industry experts have questioned this phone theory...