Pre Production airframe P13/98+02 was the first to have the modified taileron leading edge profile which has a noticeable kink.
Pre Production airframe P15/XZ631 was the first to have the production rear fuselage and a fin mounted fuel tank.
Pre Production airframe P16/98+03 was later to become the prototype for the ECR.
|PS11/98+01||Germany||05/02/77||Friedrich 'Fred' Rammensee/Kurt Schreiber|
|PS12/XZ630||Britain||14/03/77||Tim Ferguson/Roy Kenwood|
|PS13/98+02||Germany||10/01/78||Fritz Soos/Rainer Henke|
|PS14/MM7001||Italy||26/03/79||Manlio Quarantelli/Egidio Nappi|
|PS15/XZ631||Britain||24/11/78||Jerry Lee/Jim Evans|
|PS16/98+03||Germany||26/03/79||Armin Krauthann/Fritz Eckert|