DOC AIRBUS | MMEL OPS PROCFuel Quantity Indication (FQI) in Degraded Mode on the FUEL SD page
| 28-07-01-02A | Fuel Quantity Indication (FQI) in Degraded Mode on the FUEL SD page |
|---|
Applicable to: -
- On ground
The FQI is in degraded mode when the FOB indication
is displayed with two dashes across the two last digits on the EWD.
When the FQI is in degraded mode:
On the FUEL SD Page, determine which tank is affected.
The resulting loss of accuracy must be
taken into account by using the two following parameters:
- Fq : The extra fuel quantity to be loaded.
- W: The weight to be added to the total fuel weight for TOW calculation only.
Fq and W parameters are given as follows
:
LOSS OF ACCURACY DUE
TO THE FUEL QUANTITY INDICATION IN DEGRADED MODE (Values in kg) | ||
|---|---|---|
Fq (kg) | W (kg) | |
| OUTER TANK | 20 | 200 |
| INNER TANK | 110 | 110 |
| CENTER TANK | 130 | 130 |
| ALL TANKS | 390 | 750 |
LOSS OF ACCURACY DUE
TO THE FUEL QUANTITY INDICATION IN DEGRADED MODE (Values in lb - If
applicable) | ||
|---|---|---|
Fq (lb) | W (lb) | |
| OUTER TANK | 45 | 450 |
| INNER TANK | 240 | 240 |
| CENTER TANK | 290 | 290 |
| ALL TANKS | 860 | 1670 |
| Note: | At airline convenience, it is
permitted to round up Fq and W values given in the above tables, as
well as the calculated results (i.e. Fm+Fq, Fm+Fq+W, and/or Fm+Fq*+W),
to next 50 or 100 kg (lb). |
Preselect the fuel quantity required for the mission : Fm
When the refuel stops:
Enter the table and
determine Fq and W values for the affected tank.
Start again the refuel
with the new preselected quantity which corresponds to the total FOB : Fm+Fq
NOTE:
If all tanks reach high level
before having loaded the complete Fq value, this shows that all tanks
are volumetrically full but the necessary fuel mass for the mission
is not guaranteed since the fuel quantity indication varies with the
fuel density. Therefore the mission or the aircraft load must be amended
to match the minimum fuel quantity known to be onboard.
When the refuel stops again:
The FOB value to be considered for TOW calculation is: FOB = Fm+Fq+W
If all tanks reach high level before having loaded Fq value:
- The extra fuel quantity known to be onboard is Fq* with: Fq* < Fq
- The FOB value to be considered for TOW calculation is: FOB = Fm+Fq *+W
If the resulting TOW is higher than the MTOW:
The aircraft load must be reduced.
| 28-07-01-02A | Fuel Quantity Indication (FQI) in Degraded Mode on the FUEL SD page |
|---|
Applicable to: -
- On ground
The FQI is in degraded mode when the FOB indication
is displayed with two dashes across the two last digits on the EWD.
When the FQI is in degraded mode:
On the FUEL SD Page, determine which tank is affected.
The resulting loss of accuracy must be
taken into account by using the two following parameters:
- Fq : The extra fuel quantity to be loaded.
- W: The weight to be added to the total fuel weight for TOW calculation only.
Fq and W parameters are given as follows
:
LOSS OF ACCURACY DUE
TO THE FUEL QUANTITY INDICATION IN DEGRADED MODE (Values in kg) | ||
|---|---|---|
Fq (kg) | W (kg) | |
| WING TANK | 130 | 310 |
| CENTER TANK | 130 | 130 |
| ALL TANKS | 390 | 750 |
LOSS OF ACCURACY DUE
TO THE FUEL QUANTITY INDICATION IN DEGRADED MODE (Values in lb - If
applicable) | ||
|---|---|---|
Fq (lb) | W (lb) | |
| WING TANK | 290 | 690 |
| CENTER TANK | 290 | 290 |
| ALL TANKS | 870 | 1670 |
| Note: | At airline convenience, it is
permitted to round up Fq and W values given in the above tables, as
well as the calculated results (i.e. Fm+Fq, Fm+Fq+W, and/or Fm+Fq*+W),
to next 50 or 100 kg (lb). |
Preselect the fuel quantity required for the mission : Fm
When the refuel stops:
Enter the table and
determine Fq and W values for the affected tank.
Start again the refuel
with the new preselected quantity which corresponds to the total FOB : Fm+Fq
NOTE:
If all tanks reach
high level before having loaded the complete Fq value, this shows
that all tanks are volumetrically full but the necessary fuel mass
for the mission is not guaranteed since the fuel quantity indication
varies with the fuel density. Therefore the mission or the aircraft
load must be amended to match the minimum fuel quantity known to be
onboard.
When the refuel stops again:
The FOB value to be considered for TOW calculation is: FOB = Fm+Fq+W
If all tanks reach high level before having loaded Fq value:
- The extra fuel quantity known to be onboard is Fq* with: Fq* < Fq
- The FOB value to be considered for TOW calculation is: FOB = Fm+Fq *+W
If the resulting TOW is higher than the MTOW:
The aircraft load must be reduced.