Check the Operation of the ACT Inlet Valve

TASK 28-25-00-710-005-A
Check the Operation of the ACT Inlet Valve

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

WARNING: STOP THE FUEL TANKER 60 m (196.85 ft) FROM THE AIRCRAFT NOSE WHILE THE WEATHER RADAR OPERATES. DO NOT OPERATE THE FUEL TANKER/PUMP UNIT UNTIL YOU STOP THE OPERATION OF THE WEATHER RADAR.

WARNING: DO NOT SPILL FUEL ON THE ENGINES OR THE BRAKES. IF YOU SPILL FUEL ON ENGINES OR BRAKES THAT ARE HOT, IT CAN CAUSE FIRES.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: MAKE SURE THAT THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

ZONE: 190
ZONE: 500
ZONE: 600
FIN: 166QM1 ** ON A/C NOT FOR ALL
FIN: 166QM2 ** ON A/C NOT FOR ALL
FIN: 228QM1 ** ON A/C NOT FOR ALL
FIN: 228QM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT
500	LEFT WING
600	RIGHT WING
192MB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-001-A	General Refuel/Defuel Safety Procedures
TASK 12-34-24-869-001-A	Aircraft Bonding and Grounding (Earthing) for the Refuel/Defuel or Oxygen Servicing Operations
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 28-00-00-910-001-A	Fuel Safety Procedures

3. Job Set-up
Subtask 28-25-00-941-088-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Obey the safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Obey the refuel/defuel safety procedures (Ref. AMM TASK 12-11-28-650-001)
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(4) On fuel control panel 40VU and Additional Center Tank (ACT) fuel control panel 28VU:
(a) Install the WARNING NOTICE(S) to tell persons not to operate refuel/defuel system.

Subtask 28-25-00-010-089-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the refuel/defuel coupling 40QM.
(2) Open refuel/defuel panel door 192MB.

Subtask 28-25-00-860-077-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the fuel tanker is in the correct position.

WARNING: MAKE SURE THAT YOU BOND THE FUEL TANKER TO THE AIRCRAFT. IF YOU DO NOT, AN ELECTRICAL DISCHARGE CAN OCCUR WHICH CAN CAUSE AN EXPLOSION OR FIRE.

(2) Obey the local regulations for grounding (earthing) the aircraft. If you must ground (earth) the aircraft:
(a) Ground (earth) the fuel tanker/pump unit and the aircraft correctly (Ref. AMM TASK 12-34-24-869-001).
(3) Bond the fuel tanker/pump unit to the aircraft (Ref. AMM TASK 12-34-24-869-001).
(4) Remove refuel coupling cap 41QM.
(5) Make sure that the hose-coupling of the fuel tanker/pump unit is clean.

WARNING: MAKE SURE THAT THE FUEL SUPPLY HOSE IS CORRECTLY CONNECTED TO THE COUPLING BEFORE YOU REFUEL/DEFUEL THE AIRCRAFT. DO NOT CONNECT THE FUEL SUPPLY HOSE IF THERE ARE SIGNS OF DAMAGE TO THE AIRCRAFT COUPLING LUGS OR SLOTS.

(6) Connect the hose coupling of the fuel tanker/pump unit to aircraft refuel/defuel coupling 40QM.
(7) Set the fuel tanker/pump unit to the refuel mode.
(8) Make sure that the wheel-chocks are in correct position:
(a) Move the aft Nose-Landing-Gear (NLG) wheel-chocks away from the tires.

NOTE: During the refuel the NLG tires roll aft as the Main-Landing-Gear (MLG) shock-absorbers compress.

(b) Make sure that the wheel-chocks do not touch the MLG tires.

NOTE: The weight of the fuel can lower the aircraft and cause the tires to catch the wheel-chocks.

(9) Energize the aircraft electrical circuits:
(a) If you have external power available, energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(b) If you do not have external power available, on refuel/defuel control panel (800VU), put the BATT POWER switch to the ON position.

NOTE: The HOT BUSS 701PP is energized for 10 minutes only (this is to prevent discharge of the aircraft batteries), unless you put the MODE SELECT switch (on the refuel/defuel panel) to REFUEL.

Subtask 28-25-00-010-089-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the refuel/defuel coupling 100QM(40QM).
(2) Open the refuel/defuel panel door 192MB.

Subtask 28-25-00-860-077-B ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration
(1) Make sure that the fuel tanker is in the correct position.
(2) Make sure that the aircraft and the fuel tanker/pump unit are grounded (Ref. AMM TASK 12-34-24-869-001) and electrically bonded together correctly.

NOTE: Bonding is mandatory. For grounding you must obey the local area regulations.

(3) Remove the refuel coupling cap 101QM(41QM).
(4) Make sure that the coupling of the fuel supply hose is clean, then connect it to the aircraft.
(5) Energize the aircraft electrical circuits:
(a) If you have external power available, energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(b) If you do not have external power available, on the refuel/defuel control panel (800VU), put the BATT POWER switch to the ON position.

NOTE: The HOT BUSS 701PP is energized for 10 minutes only (this is to prevent discharge of the aircraft batteries), unless you put the MODE SELECT switch (on the refuel/defuel panel) to REFUEL.

4. Procedure
Subtask 28-25-00-710-081-A ** ON A/C NOT FOR ALL

A. Check the Operation of the ACT Inlet Valve
(1) Do this test:

ACTION	RESULT
1.On the panel 801VU:	On the indicator 6QT:
turn the FQI SELECT CTR/ACT switch to the ACT position	the CTR indication shows the quantity of fuel in the ACT.
put the REFUEL VALVE switch to the SHUT position.
2.On the panel 800VU: put the REFUEL VALVES switches to the SHUT position put the MODE SELECT switch to the REFUEL position.
3.Start the refuel tanker/pump unit.
4.On the panel 801VU:	On the indicator 6QT:
put the REFUEL VALVE switch to the OPEN position	the CTR indication increases
put the REFUEL VALVE switch to the SHUT position.	the CTR indication becomes stable.
5.Stop the refuel tanker/pump unit.
6.On the panel 801VU: put the REFUEL VALVE switch to the NORM and guarded position put the FQI SELECT CTR/ACT switch to the CTR + ACT position.
7.On the panel 800VU: put the MODE SELECT switch in the OFF and guarded position put the REFUEL VALVES switches in the NORM and guarded position put the BATT POWER switch in the NORM position.

Subtask 28-25-00-710-081-B ** ON A/C NOT FOR ALL

A. Check the Operation of the ACT1 and ACT2 Inlet Valves
(1) Do this test:

ACTION	RESULT
1.On the panel 801VU:	On the indicator 6QT:
turn the FQI SELECT CTR/ACT switch to the ACT1 position	the CTR indication shows the quantity of fuel in the ACT1.
put the ACT1 and ACT2 REFUEL VALVES switches to the SHUT position.
2.On the panel 800VU: put the REFUEL VALVES switches to the SHUT position put the MODE SELECT switch to the REFUEL position.
3.Start the refuel tanker/pump unit.
4.On the panel 801VU:	On the indicator 6QT:
put the ACT1 REFUEL VALVES switch to the OPEN position	the CTR indication increases
put the ACT1 REFUEL VALVES switch to the SHUT position.	the CTR indication becomes stable.
5.Stop the refuel tanker/pump unit.
6.On the panel 801VU: put the ACT1 REFUEL VALVES switch to the SHUT position.
7.On the panel 801VU:	On the indicator 6QT:
turn the FQI SELECT CTR/ACT switch to the ACT2 position.	the CTR indication shows the quantity of fuel in the ACT2.

8.Start the refuel tanker/pump unit.
9.On the panel 801VU:	On the indicator 6QT:
put the ACT2 REFUEL VALVES switch to the OPEN position	the CTR indication increases
put the ACT2 REFUEL VALVES switch to the SHUT position.	the CTR indication becomes stable.
10.Stop the refuel tanker/pump unit.
11.On the panel 801VU: put the ACT1 and ACT2 REFUEL VALVES switches to the NORM and guarded position put the FQI SELECT CTR/ACT switch to the CTR + ACT position.
12.On the panel 800VU: put the MODE SELECT switch in the OFF and guarded position put the REFUEL VALVES switches in the NORM and guarded position put the BATT POWER switch in the NORM position.

Subtask 28-25-00-710-082-C ** ON A/C NOT FOR ALL

CAUTION: DO NOT LET THE REFUEL PRESSURE BE MORE THAN THE MAXIMUM PRESSURE OF 50 PSI (3.45 BARS). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE AIRCRAFT OR EQUIPMENT CAN OCCUR.

B. Check the Operation of the ACT Inlet Valves

NOTE: If ACT is not installed, fuel-quantity ACT display shows OFF for this ACT.

(1) Do this test:

ACTION	RESULT
1.On panel 801VU:	On indicator 6QT:
Turn rotary selector switch 68QT to the AFT1 position	The ACT indication shows the quantity of fuel in ACT AFT1.
Put all the AFT REFUEL VALVES switches to the SHUT position.
2.On panel 800VU: Put the REFUEL VALVES switches to the SHUT position Put the MODE SELECT switch to the REFUEL position.
3.Start the refuel tanker/pump unit.
4.On panel 801VU:	On indicator 6QT:
Put the AFT1 REFUEL VALVE switch to the OPEN position	The ACT indication increases
Put the AFT1 REFUEL VALVE switch to the SHUT position.	The ACT indication becomes stable.
5.Stop the refuel tanker/pump unit.
6.On panel 801VU:	On indicator 6QT:
Turn rotary selector switch 68QT to the AFT2 position.	The ACT indication shows the quantity of fuel in ACT AFT2.

7.Start the refuel tanker/pump unit.
8.On panel 801VU:	On indicator 6QT:
Put the AFT2 REFUEL VALVE switch to the OPEN position	The ACT indication increases
Put the AFT2 REFUEL VALVE switch to the SHUT position.	The ACT indication becomes stable.
9.Stop the refuel tanker/pump unit.
10.On refuel/defuel panel 801VU:
Put all the AFT REFUEL VALVE switches to the NORM and guarded position.
11.On refuel/defuel panel 800VU:
Put the MODE SELECT switch to the OFF and guarded position. Put all the REFUEL VALVES switches to the NORM and guarded position. If necessary, put the BATT POWER switch to the NORM position.

5. Close-up
Subtask 28-25-00-860-079-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Put the wheel-chocks back in their original position.
(3) Disconnect the hose coupling of the fuel tanker/pump unit from aircraft refuel/defuel coupling 40QM.
(4) Remove the refuel hose from the refuel coupling.

CAUTION: MAKE SURE THAT THE HANDLE OF THE REFUEL COUPLING CAP POINTS AFT WHEN THE CAP IS CLOSED AND LOCKED.

(5) Install refuel coupling cap 41QM.
(6) Disconnect these bonding/ground cables:

Between the aircraft and the fuel tanker/pump unit.
If applicable, between the fuel tanker/pump unit and the ground.
If applicable, between the aircraft and the ground.

Subtask 28-25-00-860-079-B ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the refuel hose from the refuel coupling.
(3) Install refuel coupling cap 101QM(41QM).
(4) Remove the refuel tanker/pump unit.

Subtask 28-25-00-410-085-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close refuel/defuel panel door 192MB.

Subtask 28-25-00-942-084-A ** ON A/C NOT FOR ALL

C. Removal of Equipment
(1) Remove the WARNING NOTICE(S).
(2) If installed, remove the safety barrier(s).
(3) Remove the access platform(s).
(4) Remove the fuel tanker/pump unit.

[Rev.10 from 2021] 2026.04.02 06:17:39 UTC