Leak Test of the Wing Anti-Ice Ducts

TASK 30-11-00-790-001-A
Leak Test of the Wing Anti-Ice Ducts

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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: DO NOT USE THE APU BLEED AIR TO SUPPLY THE WING ANTI-ICE SYSTEM DURING THE GROUND TEST. THE APU BLEED-AIR SYSTEM DOES NOT SUPPLY SUFFICIENT PRESSURE FOR THE GROUND TEST PROCEDURE.

CAUTION: DO NOT USE ENGINE POWER WHEN YOU DO A LEAK TEST OF THE WING ANTI-ICE DUCTS. HOT AIR FROM THE ENGINE CAN CAUSE INJURY.

FIN: 10DL
FIN: 9DL

1. Reason for the Job

NOTE: The wing anti-ice control valve is an interchangeable part.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

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

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191DB, 522AB, 522CB, 622AB, 622CB
522YB, 622YB
FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
622CB
622AB
622YB
FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
522CB
522YB
522AB

D. Referenced Information

REFERENCE	DESIGNATION
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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 27-80-00-866-004-A	Extending the Slats on the Ground
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 57-41-37-000-004-A	Removal of the Pressure Relief Panels
TASK 57-41-37-400-002-A	Installation of the Pressure Relief Panels
TASK 30-11-42-000-001-A	Removal of the Anti-Ice Duct (for corrective action)
TASK 30-11-42-400-001-A	Installation of the Anti-Ice Duct (for corrective action)
Wing Anti-ice Control Valve (SAS 911-002A) - Location and Detail ** ON A/C NOT FOR ALL
Wing Anti-ice Control Valve (38E93-X) Location and Detail ** ON A/C NOT FOR ALL
Wing Anti-ice Control Valve (SAS 911-002A) - Location and Detail ** ON A/C NOT FOR ALL
Wing Anti-ice Control Valve (38E93-X) Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 30-11-00-941-068-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.

Subtask 30-11-00-860-051-A

B. Aircraft Maintenance Configuration
(1) Fully extend the slats (Ref. AMM TASK 27-80-00-866-004).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is on the slat/flap control lever.

Subtask 30-11-00-010-063-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at zone 520(620).
(2) Remove the applicable access panels (Ref. AMM TASK 57-41-37-000-004):
(a) FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
Remove access panels 522AB and 522CB.
(b) FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
Remove access panels 622AB and 622CB.

Subtask 30-11-00-010-063-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at zone 520(620).
(2) Remove the applicable access panels (Ref. AMM TASK 57-41-37-000-004):
(a) FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
Remove access panels 522YB and 522CB.
(b) FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
Remove access panels 622YB and 622CB.

4. Procedure
Subtask 30-11-00-860-053-A

A. Preparation for Test (for part number SAS 911-002A)

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Open the wing anti-ice control-valve:
(a) Move the indicator (2) to the OPEN position.
(b) Remove and discard the lockwire from the bolt (1).
(c) Remove the bolt (1) and install it in the end of the indicator (2) to lock it in the OPEN position.
(d) Safety the bolt (1) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(3) Connect the ground air power-cart to the aircraft:
(a) Open access door 191DB.
(b) Connect the ground air power-cart to the HP connection.
(c) On panel 30VU, put the X BLEED switch in the OPEN position.
(d) Operate the ground air power-cart and adjust the air pressure to between 2.8 bar (40.6 psi) and 3.2 bar (46.4 psi).

Subtask 30-11-00-860-068-A

B. Preparation for Test (for part number 38E93-X)

(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Open the wing anti-ice control-valve:
(a) FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
1 Move the indicator (11) to the OPEN position.
2 Remove and discard the lockwire from the screw (10).
3 Remove the screw (10) and install it in the hole (12) at the end of the indicator (11) to lock it in the OPEN position.
4 Safety the screw (10) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(b) FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
1 Move the rod (14) into the anti-ice valve until the bolt (13) is adjacent to the OPEN position.
2 Remove and discard the lockwire from the slide (15).
3 Move the slide (15) until it locks the rod (14) in position.
4 Safety the slide (15) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(3) Connect the ground air power-cart to the aircraft:
(a) Open access door 191DB.
(b) Connect the ground air power-cart to the HP connection.
(c) On panel 30VU, put the X BLEED switch in the OPEN position.
(d) Operate the ground air power-cart and adjust the air pressure to between 2.8 bar (40.6 psi) and 3.2 bar (46.4 psi).

Subtask 30-11-00-790-050-A

C. Examine the Anti-ice Ducts for Leaks
(1) Examine the anti-ice ducts in the leading edge of the wing for leaks.
(2) Replace and/or seal the ducts that leak again (Ref. AMM TASK 30-11-42-000-001) and (Ref. AMM TASK 30-11-42-400-001).

5. Close-up
Subtask 30-11-00-410-060-A

A. Close Access (for part number SAS 911-002A)

(1) Remove the ground air power-cart as follows:
(a) On panel 30VU, put the X BLEED switch in the AUTO position.
(b) Stop the ground air power-cart.
(c) Disconnect the ground air power-cart from the aircraft ground HP connection.
(d) Close access door 191DB.
(2) Close the wing anti-ice control-valve as follows:
(a) Remove and discard the lockwire from the bolt (1).
(b) Remove the bolt (1) from the indicator (2).
(c) Install the bolt (1) into the stowed position.
(d) Safety the bolt (1) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(e) Move the indicator (2) to the CLOSED position.
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Install the applicable access panels (Ref. AMM TASK 57-41-37-400-002).
(a) In the LH wing, install access panels 522AB and 522CB.
(b) In the RH wing, install access panels 622AB and 622CB.

Subtask 30-11-00-410-061-A ** ON A/C NOT FOR ALL

B. Close Access (for part number 38E93-X)

(1) Remove the ground air power-cart as follows:
(a) On panel 30VU, put the X BLEED switch in the AUTO position.
(b) Stop the ground air power-cart.
(c) Disconnect the ground air power-cart from the aircraft ground HP connection.
(d) Close access door 191DB.
(2) Close the wing anti-ice control-valve as follows:
(a) FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
1 Remove and discard the lockwire from the screw (10).
2 Remove the screw (10) from the indicator (11).
3 Install the screw (10) into the stowed position.
4 Safety the screw (10) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
5 Move the indicator (11) to the CLOSED position.
(b) FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
1 Remove and discard the lockwire from the slide (15).
2 Move the slide (15) to the center position.
3 Move the rod (14) until the bolt (13) is adjacent to the CLOSED position.
4 Safety the slide (14) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Install the applicable access panels (Ref. AMM TASK 57-41-37-400-002):
(a) In the LH wing, install access panels 522AB and 522CB.
(b) In the RH wing, install access panels 622AB and 622CB.

Subtask 30-11-00-410-061-B ** ON A/C NOT FOR ALL

B. Close Access (for part number 38E93-X)

(1) Remove the ground air power-cart as follows:
(a) On panel 30VU, put the X BLEED switch in the AUTO position.
(b) Stop the ground air power-cart.
(c) Disconnect the ground air power-cart from the aircraft ground HP connection.
(d) Close access door 191DB.
(2) Close the wing anti-ice control-valve as follows:
(a) FOR [9DL] (VALVE-WING ANTI ICE CONTROL, L)
1 Remove and discard the lockwire from the screw (10).
2 Remove the screw (10) from the indicator (11).
3 Install the screw (10) into the stowed position.
4 Safety the screw (10) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
5 Move the indicator (11) to the CLOSED position.
(b) FOR [10DL] (VALVE-WING ANTI ICE CONTROL, R)
1 Remove and discard the lockwire from the slide (15).
2 Move the slide (15) to the center position.
3 Move the rod (14) until the bolt (13) is adjacent to the CLOSED position.
4 Safety the slide (14) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Install the applicable access panels (Ref. AMM TASK 57-41-37-400-002).
(a) In the LH wing, install access panels 522YB and 522CB.
(b) In the RH wing, install access panels 622YB and 622CB.

Subtask 30-11-00-860-052-A

C. Aircraft Maintenance Configuration
(1) Fully retract the slats (Ref. AMM TASK 27-80-00-866-005).
(2) Make sure that the electrical systems are de-energized (Ref. AMM TASK 24-41-00-862-002).

Subtask 30-11-00-942-066-A

D. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:28:20 UTC