I have no knowledge of JSP 553 or the servicing procedures on the Nimrod but I do have an interest in knowing the cause of the explosion that lead to the crash of XV230.
The comments made by "Safeware" are in my view the most erudite that I have seen on this subject. I also, believe that the ground crews and engineering staff will have done everything they can to maintain serviceable aircraft to the standard demanded by the RAF. For this they deserve the thanks of everyone, especially those who fly any aircraft.
However - in the case of XV230, if it subsequently transpires that the manufacturer had advised fire suppressant measures which were not implemented on the grounds of cost then it shows a remarkable lack of appreciation of the level of risk posed to those flying the aircraft and a low level of risk management. In other words incompetence. Should it be shown that the hazard was identified but a conscious decision was taken to ignore it on commercial, financial or political grounds, that is criminal.