Hi JELLY
The main tanks on the A332 have temp indications to monitor IDG cooling just as someone else posted , and the outer left tank has an indication and not the outer right , the logic being that due to the exact distance on either side the temp on the rights pretty much going to be the same if not the same as that on the left so therfore no indication on the right hand side . . . .
however I think the answer celtic gave is pretty accurate , once the value drops < 1100 kg indication goes off
