"The report released Friday said the computer unit that caused the airliner to dive had been exposed under test conditions to an electromagnetic field 1,700 times stronger than it had experienced from the naval transmitter when it malfunctioned."
The field strength may have been 1700 times stronger BUT the frequencies involved are totally different.
The submarine comms uses LF, way below the medium wave band.
I thought that DO-160 RF susceptability tested started at 100MHz, so it would not have been tested for a radiated field at that frequency....