Cameron CB599 40 liter tank. Slave. Built 16 November 1988. Light blue cover. CN 2963-1470. According to Camerons Flight Manual, this tank can be used till November 16th, 2013. Inspected recently. PRV and internal + pressure test carried out in 2009. No part replacements or 'serious' inspections needed until the end of the tank's allowed life time.