Burden travelled to Eden, Germany on December 1 and 2, to meet with representatives of the company that built the vessel, Thyssen Nordseewerke, to determine the structural situation of the submarine in its current location.
He showed Congress a digital reconstruction of the submarine where he pointed out the areas of the vessel where water is suspected to have entered.
Joining him was Rear Admiral Rafael Pietro, ex commander of the Fleet at the time of the disappearance.
Pietro told Congress that Argentine Navy officials had begun speaking about "a possible implosion" just days after the disappearance the vessel. He remembered a videoconference with the "commander of the US Souther Command" Kurt Tidd.
"There was never any disagreement with the Russian, US or British commands about what to do" to find the ARA San Juan, he insisted.
Congress' cross-chamber investigative committee was given one year to investigate the incident but request an extension to July 31, which lawmakers in both chambers must now agree upon.