PPRuNe Forums > Flight Deck Forums > Tech Log > A321 - FQI Degraded Mode MEL PDA View Full Version : A321 - FQI Degraded Mode MEL Bula22nd Jul 2012, 07:06Operated an A321 the other day with an MEL due to FQI being in degraded mode. This was the all tanks scenario. I am trying the fathom the concept of the application of the MEL but alas have drawn a blank. FCOM PRO-SUP-28 P1/2 shows that with the all tanks scenario, the resultant loss of accuracy is +390kg, -750 kg. When applying the MEL is asks for us to conduct the following: Determine Fm (Fuel for the mission) = Flight plan minimum. And from the table: Determine Fq (Fuel Quantity to be loaded) = 390 kg Determina W (The weight to be added t the total fuel weight for TOW cal only = 750 kg. For refuelling: 1. Preselect FM 2. When refuel stops preselect FOB = Fm + Fq. Ok so we are allowing that the gauge may over read by 390 kg according to PRO-SUP... fair enough. For example Fm = 6 000kg Fm + Fq = 6 390kg (As you may only have 6 onboard... fair enough) What I can't quite get my head around is this statement: * When the auto refuel stops again: The FOB to be considered for TOW calculation is: FOB = Fm+Fq+W. Why are we adding Fq AND W. Wouldn't W be more limiting and hence cover the requirement for both? You may have selected 6 390kg but actually have......7 140 kg....FOB = Fm+Fq+W............aaarrgghh.. just answered my own question. Posted because I spent the time typing it :)... DISREGARD :ugh: