Very interesting article with a lot of good history on PAA and they M-130 but the claim that the radio operator would send a message saying Wind 19 knots per hour is pure bull dust.
From there on there is too little fact and far too much (often wild) conjecture.
Some have speculated Japanese fighters shot it down is highly suspect unless there is evidence of a Japanese carrier in the area because I doubt that there were any Japanese land bases within fighter flying range of the PAA aircraft and know that intercepting an aircraft that left 30 minutes late and was even further behind schedule due to head winds in low visibility weather would require more fuel and an unreal level of luck. The same would apply to a carrier based aircraft to a lesser extent and the reported weather is such that a carrier might well have found it impossible to launch aircraft.
Two paragraphs near the end are the ones I would put the greatest faith in.
The Air Safety Board of the Civil Aeronautics Authority convened an investigation into the Hawaii Clipper's disappearance. The final report concluded:"A number of theories have been advanced as to the reason for the disappearance. The board considered each of them…however, [we]…cannot properly include a discussion of conjectures unsupported by facts. The Board, therefore respectfully submits…that additional evidence may yet be discovered and the investigation completed at that time."
and
In 1979 Horace Brock noted in his book Flying the Oceans, "There is no question but that [Terletzky ran] into a very bad storm." Perhaps the turbulent weather caused a catastrophic structural failure related to the sponson struts. It seems unlikely we'll ever know for sure. But until someone comes up with conclusive evidence, it's easier to assume the Hawaii Clipper succumbed to what Brock calls "a predictable tragedy" than to believe it was hijacked by renegade Japanese officers. Either way, the Hawaii Clipper mystery lives on.