Yes, there have been suggestions/speculation in these pages & elsewhere since day 1 that a high alt. upset might have occurred..
Aircraft of this type can remain out of control, in other modes than the 'T-tailed deep-stall'... e.g. the spinning characteristics are not explored fully during flight-test.
And of course, if IMC instruments are not all available, even a spiral dive can easily become critical.
Reading an assortment of the past posts should give you a good background to what might be possible or not
Last edited by HarryMann; 24th Jun 2009 at 10:44.