I agree, early 1980s. There was a bit more to it though. As I remember, it was only the second QF landing into LAX and the crew were given a "mud map" by the 1st crew which was supervisory crew. The mud map featured fuel tanks as a marker. The trouble was that there were 2 different lots of fuel tanks. One lot not seen by crew number one and that was what caused the confusion.
I was on crew 3 waiting in HNL and we rapidly had the mud map withdrawn from our brief sheets.
Wunwing