This from
www.jodel.com :-
The web site of Robin Aviation ran the following piece which is of interest to all DR400 owners:
DR 400 spar inspection
In June 1997, a DR 400 built in 1990 crashed near Paris. The French Bureau of Aeronautical Investigations (BEA) noticed a level of quality of bonding xhich he thought might be inappropriate on part of the spar-web.
A test-spar was then built matching that off fallen aircraft. A static test was performed under the scrutiny of court experts and F-DGAC officers. The test spar proved twice as strong as required by applicable regulations for spar limit loads. On the basis of this test, a court decision has ruled out the manufacturer’s liability in the crash.
Despite this good results, F-DGAC has required several sample inspections on the 1974 to 1998 DR 400 fleet to determine whether the risk of a spar failure could reasonably be waived. The result of these inspections (130 aircraft out of 1300) has been quoted by DGAC as neither alarming nor totally satisfactory.
Hence, F-DGAC is in process of editing a CN (the French form for an AD), based on the now prevailing precaution principle, requiring that all the DR 400 built between 1974 and 1998 be inspected by next 1000h / 3 years or 2000h / 6 years maintenance check. This inspection may be performed by the usual maintenance shop if properly approved to do so by the qualified Airworthiness Authorities. The manufacturer’s JAR 145 maintenance shop will propose a specific training program. The inspection may also be performed by the said maintenance shop if so wished by the aircraft owner. We are aware that this inspection means unexpected costs in already difficult times. We have done our best efforts to stop this decision and make it as low cost as possible when imposed. We shall continue to work towards these goals with all the parties to the case.
Release from Apex Aircraft, manufacturer of Robin aircraft. November 26, 2001. Copyright reserved. Authorised copy if 100% conforming to the original
edit to add that the AD # is 2001-570. I guess that you need to speak to the CAA or the dealers to get a copy.