posted on Sep, 21 2015 @ 08:34 PM
The Air Force has detailed the problems that Boeing has been having with the fuel system on EMD-2, which will also affect the other three EMD
The problems began in February during testing of the fuel system for FAA certification when the fuel manifold failed a pressure test. Under c certain
conditions it was reported that the system could leak. It took two months for that problem to be resolved.
During a fuel system audit it was found that fuel lines had insufficient welds that would cause their early failure. The tubes are supposed to last 40
years. EMD-1, 2, and 4 will need them replaced in the near future. By August 2017 they are required to have production representative parts
The other problem found is that the tubes have too many attachment points, making them too stiff and subject to failure.
EMD-3 was cannibalized to repair -2 putting it further behind -4 which has undergone power on testing and cargo system verification. EMD-2 is
scheduled to fly next Friday as the first flight of an actual KC-46.