No crossfeed with that switch position, fuel would not have been available to the engines either with the fuel tank selectors closed.
Off piste, but another fuel starvation incident. I mention it merely because did the two aircraft have similar fuel systems?
Convair 340, N73102, experienced a forced landing near in Saugus, California on December 30, 1964. United scheduled this aircraft to fly a non stop flight from Freseno Air Terminal, to Los Angeles International Airport, a distance of 181 nautical miles. While over the Santa Clarita Valley, the town of Saugus, both engines stopped. The United pilot did an excellent job of making a "dead stick" forced landing, gear up, in an onion field in Saugus, CA.
United mechanics hoisted the airplane, lowered the landing gear, replaced the propellers and some other parts. Convair 340 N73102 being given basic repairs on site after a forced landing. A United Airlines pilot made the take off from the onion field, flew the airplane gear down to San Francisco for in depth mechanical examination of the ship.
Cause of both engines stopping was fuel starvation. Tthe crew apparently encountered a fuel pump problem at Fresno. To overcome this the crew started the engine with the problem fuel pump using fuel cross feed from the working engine. Fuel cross feed allows an engine with a good fuel pump to send fuel to the opposite engine. Problem here, according to the American Airlines pilot, was the United crew failed to turn OFF the cross feed after the second engine stated. So both engines fed off the same fuel tank. With both engines feeding from one tank the engines quit about 35 miles north of their intended destination.
Importantly, at the time there was an error in the flight manual about crossfeed operation. The pilot was operating the x-feed system in line with how they were trained. Both training and maintenance erroneously thought that the Convair, like the DC-6, had a check valve that prevented transferring fuel from tank to tank. Even the flight manual at the time was wrong. The pilot essentially got led into a trap.
Edited to add: Yes some aircraft did have a fuel dump system, was a mod developed by Pan American Airways. See the type certificate at
http://rgl.faa.gov/Regulatory_and_Gu...FILE/a-793.pdf