What Wreck?

Mr. Kelsey, you referred to a rollover wreck in 1943 with the 20 and 40. That is the first time I had heard of that, but with the RGS it was probably just one of many so the books on the RGS I've read may not have considered it noteworthy enough to publish. However, if I recall correctly, the 40 was permanantly taken out of service and then scrapped around 1943. Was this wreck resposible for the permanent removal from service of the 40? I would like to hear some of the details of this wreck if anyone knows them, i.e. date, place, and what happened. Thanks.