Hi Adriano,
Look at the 49 Sqn website,
http://www.bomberhistory.co.uk/49squ...in%20Menu.html ,among the headings is a "Contact Us" and this gives access to e-mail links one of which is an Archivist. They may have the details you need. The a/c was shot down by a nightfighter on the crews 1st op , Berlin,29-30/Mar/43 according to Mabee's entry on the Roll of Honour.
Regards
Dick