I don't fly CFM engines nor do i fly a 737. however, i gather you a talking about a failure of both engines. What seems to be common is the scope of the restart/relight envelope.
Firstly, Mmo exceedance..... Really? A. What's the Md on the 737, B. why would you want to be anywhere near there? But any case I think you will find a Mach/IAS limit on the relight envelope.
Secondly, what is the upper limit of the restart/relight envelope? I would suggest you may need to be below FL300 before the initiation of a successful relight.
Last edited by Bula; 31st May 2013 at 04:51.