Did they not forbid the passing of fuel lines joined by couplings through a dry bay that included a source of ignition?
Chug
You will have to forgive me but I do not have a copy of the accident report to hand, but my (somewhat faded) memory seems to remember the fuel came from elsewhere leaking into the dry bay not from any couplings within the dry bay. Am I wrong? I thought the fuel came from one of the centre tanks. Back to you.
As to airworthiness regulations, when were they written; before or after the aircraft was designed and built?