GC47G Sadly I cannot remember the detail now. Its over 20 years since I retired. Our practise re overnight refuelling was this. We had a large capacity mobile bowser at the unit. It was powered by an on board diesel generator. The fuel farm which closed at about 6.00pm would come over last thing before finishing and ensure that our own bowser was fully topped up. Then the aircraft would be refuelled as required during the remainder of the night from our own bowser. Refueling would always be at the direction and supervised by the PIC. At that time all of our observers were long time members of the unit, and well versed in the method of refuelling. They worked very much as a team, which is why I have always pressed for detail of the crews conversation with their control room. I cannot believe that my guys would have just sat there with the warning lights illuminated and said nothing to their C/R. But we've been through this conversation before, and I accept that that avenue was covered.
It seems that there must have been some form of CRM failure.
TF