Its with interest and sadness that I note the date of the report showing that in fact fuel bladders do work is 30/4/12. Sad because its only now; 3/4/2013, that a Airworthiness Bulletin ( still not an AD) is released stating in effect that the Service Bulletin and the date for tanks to be fitted with bladders is to be adhered to and in effect its not legal to fly after 30 April 2013. I know that reminders have been sent out but there are a lot of commercial operators and others who resist or lag behind on SB and only act on AD's. I've been offered for sale and in fact bought machines that haven't had all SB's up to date. Great to see though that fuel bladders seem to work. Service Bulletin below refers:
http://casa.gov.au/wcmswr/_assets/main/airworth/awb/02/044.pdf