DOC AIRBUS | AMM A320FWeighing and Balancing
TASK 08-10-00-200-001-A
Weighing and Balancing
1. Reason for the Job
This procedure gives data to find the operating empty weight of the aircraft and to calculate the center of gravity.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 08-10-00-010-051-A
Subtask 08-10-00-220-052-A ** ON A/C NOT FOR ALL
Subtask 08-10-00-584-051-A
[Rev.10 from 2021]
2026.03.31 22:52:56 UTC
Weighing and Balancing
1. Reason for the Job
This procedure gives data to find the operating empty weight of the aircraft and to calculate the center of gravity.
NOTE: To get accurate results, we recommend that you weigh the aircraft on a level area in a hangar with:
This is because wind and air flows prevent accurate results. - The hangar doors and windows closed
- The hangar heating, air conditioning and ventilation systems stopped.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE |
| No specific | AR | INCLINOMETER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 831 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 07-11-00-581-001-A | Lifting for Aircraft Maintenance Operations |
| TASK 07-11-00-581-803-A | Lifting of the Aircraft on Landing Gear Jacks |
| TASK 07-11-00-586-002-A | Lowering of the Aircraft for Maintenance Operations |
| TASK 07-11-00-586-802-A | Lowering of the Aircraft on Landing Gear Jacks |
| TASK 08-21-00-200-001-A-02 | Quick Leveling Procedure with the ADIRU |
| TASK 09-10-00-584-002-A | Towing by the Nose Landing Gear from the Front with a Towbar |
| TASK 09-10-00-584-006-A | Towing with the Towbarless Tractor |
| TASK 09-10-00-584-008-A | Towing by the Nose Landing Gear from the Front with a Towbar (on Batteries only) |
| TASK 09-10-00-584-009-A | Towing with the Towbarless Tractor (on Batteries only) |
| TASK 12-11-28-650-003-A | Pressure Refuel with Automatic Control |
| TASK 12-11-28-650-004-A | Pressure Refuel with Manual Control |
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 12-12-29-611-002-A | Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart |
| TASK 12-13-24-612-011-A | Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check |
| TASK 12-13-24-612-041-A | Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check |
| TASK 12-13-24-612-041-B | Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a level Check |
| TASK 12-13-24-612-803-A | Integrated Drive Generator (IDG) Servicing - Filling of the IDG with Oil or Addition of Oil after a Level Check |
| TASK 12-13-49-612-001-A | Check APU Oil Level and Replenish |
| TASK 12-13-79-610-001-A | Check Oil Level and Replenish |
| TASK 12-13-79-610-001-A-01 | Check Oil Level and Replenish (Pressure Filling) |
| TASK 12-13-79-610-002-A | Check oil level and replenish Check Pop Out Indicator of EMCD (Electrical Master Chip Detector) |
| TASK 12-13-79-610-002-A-01 | Check oil level and replenish (Pressure Filling) |
| TASK 12-13-79-610-011-A | Check Oil Level and Replenish |
| TASK 12-13-79-612-803-A | Engine Oil Servicing |
| TASK 12-14-32-614-003-A | Functional Check of MLG Shock Absorber Charge Pressure |
| TASK 12-14-32-614-004-A | Check of the NLG Shock Absorber Charge-Pressure |
| TASK 12-24-38-680-001-A | Draining of the Potable Water System (with Electrical Power) |
| TASK 12-24-38-680-002-A | Draining of the Potable Water System (without Electrical Power) |
| TASK 27-50-00-866-009-A | Retraction of the Flaps on the Ground |
| TASK 27-50-00-866-009-A-01 | Retraction of the Flaps/Slats on the Ground |
| TASK 27-60-00-866-002-A | Extension-Retraction of the Spoilers for Maintenance |
| TASK 27-80-00-866-005-A | Retracting the Slats on the Ground |
| TASK 27-80-00-866-008-A | Manual Retraction of the Slats |
| TASK 28-22-00-710-001-A | Operational Test of the APU Fuel-Pump System on Ground to Purge the Fuel Line |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| TASK 28-25-00-650-003-A | To Drain Remaining Fuel from the Wing Tanks and the Center Tank |
| TASK 28-25-00-650-003-A-01 | To Drain Remaining Fuel from the Wing Tanks and the Center Tank |
| TASK 28-25-00-650-005-A | To Drain the Remaining Fuel from the Additional Center Tank (ACT) |
| TASK 29-30-00-200-002-A | Check of the Reservoir Quantity Indication on the ECAM Display Unit |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
| TASK 32-22-00-410-001-A | Nose Gear Doors - Ground Doors Closing |
| TASK 32-41-00-210-003-A | Functional Check of Tire Pressures |
| TASK 38-31-00-680-001-A | Draining of the Toilet System |
| TASK 52-10-00-010-001-A | Opening of the Passenger/Crew Door |
| TASK 52-10-00-410-001-A | Closing of the Passenger/Crew Door |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 71-00-00-710-002-A | Wet Motoring Check |
| TASK 71-00-00-710-002-B | Wet Motoring Check |
| TASK 71-00-00-710-046-B | Test No.2 : Wet Motor Leak Check |
| TASK 71-00-00-720-814-A | Test No. 2A - Engine Motor Leak Test (Wet Method) |
Subtask 08-10-00-010-051-A
A. Get Access
(1) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position in front of access door 831.
(2) Open access door 831 (Ref. AMM TASK 52-10-00-010-001).
Subtask 08-10-00-210-053-A ** ON A/C NOT FOR ALL (1) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position in front of access door 831.
(2) Open access door 831 (Ref. AMM TASK 52-10-00-010-001).
B. Check of the Fluid Levels
(1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-610-001).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-041).
Subtask 08-10-00-210-053-B ** ON A/C NOT FOR ALL (1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-610-001).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-041).
B. Check of the Fluid Levels
(1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-610-011).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-011).
Subtask 08-10-00-210-053-D ** ON A/C NOT FOR ALL (1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-610-011).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-011).
B. Check of the Fluid Levels
(1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-610-002).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-041).
Subtask 08-10-00-210-053-F ** ON A/C NOT FOR ALL (1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-610-002).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-041).
B. Check of the Fluid Levels
(1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-612-803).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-803).
Subtask 08-10-00-680-050-A (1) Do a check of the engine oil level and fill the engine, if necessary (Ref. AMM TASK 12-13-79-612-803).
(2) Do a check of the oil level of the Auxiliary Power Unit (APU) and fill the APU, if necessary (Ref. AMM TASK 12-13-49-612-001).
(3) Do a check of the hydraulic fluid level in the systems (Ref. AMM TASK 29-30-00-200-002) and fill the systems, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Do a check of the oil level of the Integrated Drive Generator (IDG) and fill the IDG, if necessary (Ref. AMM TASK 12-13-24-612-803).
C. Draining of the Potable Water and Water/Waste System
(1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
(2) Drain the waste water from the toilets and the toilet systems (Ref. AMM TASK 38-31-00-680-001).
Subtask 08-10-00-614-050-A (1) Drain the potable water system (Ref. AMM TASK 12-24-38-680-001) or (Ref. AMM TASK 12-24-38-680-002).
(2) Drain the waste water from the toilets and the toilet systems (Ref. AMM TASK 38-31-00-680-001).
D. Check of the Pressure of the Main Landing Gear (MLG) and Nose Landing Gear (NLG) Shock Absorbers and Check of the Tire Pressure
(1) Make sure that the pressure of the shock absorbers is correct:
Subtask 08-10-00-010-050-A (1) Make sure that the pressure of the shock absorbers is correct:
- For the MLG (Ref. AMM TASK 12-14-32-614-003)
- For the NLG (Ref. AMM TASK 12-14-32-614-004).
E. Removal of Components
(1) Remove all tools and protection devices from the aircraft.
Subtask 08-10-00-210-051-A (1) Remove all tools and protection devices from the aircraft.
F. Aircraft Maintenance Configuration
(1) Retract the spoilers (Ref. AMM TASK 27-60-00-866-002).
(2) Retract the flaps (Ref. AMM TASK 27-50-00-866-009).
(3) Retract the slats (Ref. AMM TASK 27-80-00-866-005) or (Ref. AMM TASK 27-80-00-866-008).
(4) Make sure that all the flight control surfaces are in the neutral position.
(5) Examine the aircraft externally and internally to make sure that all the weighing conditions are correct:
Subtask 08-10-00-650-050-A (1) Retract the spoilers (Ref. AMM TASK 27-60-00-866-002).
(2) Retract the flaps (Ref. AMM TASK 27-50-00-866-009).
(3) Retract the slats (Ref. AMM TASK 27-80-00-866-005) or (Ref. AMM TASK 27-80-00-866-008).
(4) Make sure that all the flight control surfaces are in the neutral position.
(5) Examine the aircraft externally and internally to make sure that all the weighing conditions are correct:
- Passenger and cargo compartment equipment/galleys installed
- Ground power units (electrical, hydraulic, air conditioning) disconnected
- External panels installed and closed
- Cargo pallets and baggage containers removed.
G. Defueling of the Aircraft
(1) Make sure that the engine feed pipes are correctly filled with fuel. For the wet conditions of the engines before you do the weighing, refer to eWBM:CTL-FUEL-DFL.
(2) Make sure that the APU fuel lines are correctly filled with fuel (Ref. AMM TASK 28-22-00-710-001).
(3) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
(4) Put the aircraft at an attitude of 0 deg. pitch and 0 deg. roll with the Air Data/Inertial Reference System (ADIRS) or the INCLINOMETER (Ref. AMM TASK 08-21-00-200-001).
(5) Drain the remaining fuel from all the fuel tanks:
Subtask 08-10-00-410-050-A (1) Make sure that the engine feed pipes are correctly filled with fuel. For the wet conditions of the engines before you do the weighing, refer to eWBM:CTL-FUEL-DFL.
(2) Make sure that the APU fuel lines are correctly filled with fuel (Ref. AMM TASK 28-22-00-710-001).
(3) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
(4) Put the aircraft at an attitude of 0 deg. pitch and 0 deg. roll with the Air Data/Inertial Reference System (ADIRS) or the INCLINOMETER (Ref. AMM TASK 08-21-00-200-001).
(5) Drain the remaining fuel from all the fuel tanks:
- For the wing tanks and the center tank (Ref. AMM TASK 28-25-00-650-003)
- For the additional center tank (if installed) (Ref. AMM TASK 28-25-00-650-005).
NOTE: While you drain the fuel, it is important that the wings do not have support and that you attach the engines or equivalent weight.
NOTE: Data about the quantities of undrainable fuel remaining in the tanks and systems is given in the "Table of Undrainable Fuel" in eWBM:CTL-FUEL-QTY.
H. Close Access
(1) Close the NLG doors if opened (Ref. AMM TASK 32-22-00-410-001).
(2) Close the MLG doors if opened (Ref. AMM TASK 32-12-00-410-001).
(3) Close the doors of the aft and forward cargo compartments if opened (Ref. AMM TASK 52-30-00-860-002).
(4) Close all the access doors/panels if opened.
(5) Close the passenger/crew doors (Ref. AMM TASK 52-10-00-410-001).
Subtask 08-10-00-584-050-A (1) Close the NLG doors if opened (Ref. AMM TASK 32-22-00-410-001).
(2) Close the MLG doors if opened (Ref. AMM TASK 32-12-00-410-001).
(3) Close the doors of the aft and forward cargo compartments if opened (Ref. AMM TASK 52-30-00-860-002).
(4) Close all the access doors/panels if opened.
(5) Close the passenger/crew doors (Ref. AMM TASK 52-10-00-410-001).
I. Towing of the Aircraft
(1) Tow the aircraft to the area where you will weigh it:
Subtask 08-10-00-860-050-A (1) Tow the aircraft to the area where you will weigh it:
- Towing by the NLG from the front with a towbar (Ref. AMM TASK 09-10-00-584-002), or
- Towing with a towbarless tractor (Ref. AMM TASK 09-10-00-584-006), or
- Towing by the NLG from the front with a towbar (on batteries only) (Ref. AMM TASK 09-10-00-584-008), or
- Towing with a towbarless tractor (on batteries only) (Ref. AMM TASK 09-10-00-584-009).
J. Aircraft Maintenance Configuration
(1) Release the brakes.
4. Procedure(1) Release the brakes.
Subtask 08-10-00-220-052-A ** ON A/C NOT FOR ALL
A. Weighing of the Aircraft and Calculation of the Position of the Center of Gravity
(a) Put the weighing devices in position.
(b) Refer to eWBM:CTL-GRD-AWG to:
(a) Lift the aircraft with the jacks (Ref. AMM TASK 07-11-00-581-001).
(b) Refer to eWBM:CTL-GRD-AWG to:
(3) Weigh the aircraft and calculate the position of the center of gravity with the aircraft on landing gear jacks:
(a) Install weighing devices.
(b) Lift the aircraft with the landing gear jacks (Ref. AMM TASK 07-11-00-581-803).
(c) Refer to eWBM:CTL-GRD-AWG to:
Subtask 08-10-00-220-052-C ** ON A/C NOT FOR ALL NOTE: You can weigh the aircraft in these configurations:
(1) Weigh the aircraft and calculate the position of the center of gravity with the aircraft on its wheels: - Aircraft on wheels
- Aircraft on jacks
- Aircraft on landing gear jacks.
(a) Put the weighing devices in position.
(b) Refer to eWBM:CTL-GRD-AWG to:
- Find the aircraft pitch attitude
- Find the aircraft weight
- Calculate the aircraft center of gravity.
(a) Lift the aircraft with the jacks (Ref. AMM TASK 07-11-00-581-001).
(b) Refer to eWBM:CTL-GRD-AWG to:
- Find the aircraft pitch attitude
- Find the aircraft weight
- Calculate the aircraft center of gravity.
NOTE: If you use platform scales, the weight of the jacks is subtracted.
(c) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-002). (3) Weigh the aircraft and calculate the position of the center of gravity with the aircraft on landing gear jacks:
(a) Install weighing devices.
(b) Lift the aircraft with the landing gear jacks (Ref. AMM TASK 07-11-00-581-803).
(c) Refer to eWBM:CTL-GRD-AWG to:
- Prepare the aircraft for weighing
- Make the aircraft level
- Find the aircraft weight
- Calculate the aircraft center of gravity.
NOTE: If you use platform scales, the weight of the jacks is subtracted.
(d) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-802). A. Weighing of the Aircraft and Calculation of the Position of the Center of Gravity
(a) Put the weighing devices in position.
(b) Refer to eWBM:CTL-GRD-AWG to:
(a) Lift the aircraft with the jacks (Ref. AMM TASK 07-11-00-581-001).
(b) Refer to eWBM:CTL-GRD-AWG to:
(3) Weigh the aircraft and calculate the position of the center of gravity with the aircraft on landing gear jacks:
(a) Install weighing devices.
(b) Lift the aircraft with the landing gear jacks (Ref. AMM TASK 07-11-00-581-803).
(c) Refer to eWBM:CTL-GRD-AWG to:
5. Close-upNOTE: You can weigh the aircraft in these configurations:
(1) Weigh the aircraft and calculate the position of the center of gravity with the aircraft on its wheels: - Aircraft on wheels
- Aircraft on jacks
- Aircraft on landing gear jacks.
(a) Put the weighing devices in position.
(b) Refer to eWBM:CTL-GRD-AWG to:
- Find the aircraft pitch attitude
- Find the aircraft weight
- Calculate the aircraft center of gravity.
(a) Lift the aircraft with the jacks (Ref. AMM TASK 07-11-00-581-001).
(b) Refer to eWBM:CTL-GRD-AWG to:
- Find the aircraft pitch attitude
- Find the aircraft weight
- Calculate the aircraft center of gravity.
NOTE: If you use platform scales, the weight of the jacks is subtracted.
(c) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-802). (3) Weigh the aircraft and calculate the position of the center of gravity with the aircraft on landing gear jacks:
(a) Install weighing devices.
(b) Lift the aircraft with the landing gear jacks (Ref. AMM TASK 07-11-00-581-803).
(c) Refer to eWBM:CTL-GRD-AWG to:
- Prepare the aircraft for weighing
- Make the aircraft level
- Find the aircraft weight
- Calculate the aircraft center of gravity.
NOTE: If you use platform scales, the weight of the jacks is subtracted.
(d) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-802). Subtask 08-10-00-584-051-A
A. Towing of the Aircraft
(1) Tow the aircraft from the weighing area:
Subtask 08-10-00-650-051-A (1) Tow the aircraft from the weighing area:
- Towing by the NLG from the front with a towbar (Ref. AMM TASK 09-10-00-584-002), or
- Towing with a towbarless tractor (Ref. AMM TASK 09-10-00-584-006), or
- Towing by the NLG from the front with a towbar (on batteries only) (Ref. AMM TASK 09-10-00-584-008), or
- Towing with a towbarless tractor (on batteries only) (Ref. AMM TASK 09-10-00-584-009).
B. Refuel the Aircraft
(1) Refuel the aircraft after weighing (Ref. AMM TASK 12-11-28-650-003) (Ref. AMM TASK 12-11-28-650-004).
Subtask 08-10-00-710-050-A ** ON A/C NOT FOR ALL (1) Refuel the aircraft after weighing (Ref. AMM TASK 12-11-28-650-003) (Ref. AMM TASK 12-11-28-650-004).
C. Wet Motoring Check
(1) Do a wet motoring check (Ref. AMM TASK 71-00-00-710-002).
Subtask 08-10-00-710-050-B ** ON A/C NOT FOR ALL (1) Do a wet motoring check (Ref. AMM TASK 71-00-00-710-002).
NOTE: Maintenance messages related to the fuel system can occur during the first engine start. The cause of these messages can be air that went into the system during the related fuel drain procedure. The first engine ground run will automatically remove this air. Thus, during subsequent engine starts, the messages will not show again, unless there is a different cause.
C. Wet Motoring Check
(1) Do a wet motoring check (Ref. AMM TASK 71-00-00-710-046).
Subtask 08-10-00-710-050-C ** ON A/C NOT FOR ALL (1) Do a wet motoring check (Ref. AMM TASK 71-00-00-710-046).
NOTE: Maintenance messages related to the fuel system can occur during the first engine start. The cause of these messages can be air that went into the system during the related fuel drain procedure. The first engine ground run will automatically remove this air. Thus, during subsequent engine starts, the messages will not show again, unless there is a different cause.
C. Wet Motoring Check
(1) Do a wet motoring check (Ref. AMM TASK 71-00-00-720-814).
(1) Do a wet motoring check (Ref. AMM TASK 71-00-00-720-814).
NOTE: Maintenance messages related to the fuel system can occur during the first engine start. The cause of these messages can be air that went into the system during the related fuel drain procedure. The first engine ground run will automatically remove this air. Thus, during subsequent engine starts, the messages will not show again, unless there is a different cause.