Robin
While I would agree that the DR400 should not be landed hard this goes for all aircraft, the wooden structure in the adding gear area is massive and in an accident it is usually the landing gear legs Normaly fail before the wing structue ( we have a number of broken airframes that are a testament to that fact).
To my mind the thing that is likely to cause the most damage to the structure would be the continual hammering it would get from badly serviced shock struts, the post above from full wings seems to back up my opinion on the critical nature of correct servicing of the shock struts.
Last edited by A and C; 9th Sep 2012 at 18:08.