Installation of the Oxygen Filling Port

TASK 35-11-42-400-001-A
Installation of the Oxygen Filling Port

WARNING: KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCE OF OXYGEN. OXYGEN BECOMES EXPLOSIVE WHEN IT TOUCHES HYDROCARBONS.

WARNING: CLEAN THE TOOLS AND MAKE SURE YOUR HANDS ARE CLEAN TO PREVENT CONTAMINATION OF THE OXYGEN SYSTEM.

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

CAUTION: BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.

ZONE: 123
ZONE: 125
FIN: 5769HM ** ON A/C NOT FOR ALL
FIN: 5769HM1 ** ON A/C NOT FOR ALL
FIN: 5769HM2 ** 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	WRENCH - STANDARD
No specific	Torque wrench: range to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )
No specific	Torque wrench: range to between 2.14 and 1.52 m.daN (15.78 and 11.21 lbf.ft )
FOR [5769HM] (FILL PORT-OXY SYS)
No specific	1	NITROGEN COMPRESSED SOURCE - GROUND
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.275 and 0.225 m.N (2.43 and 1.99 lbf.in )
FOR [5769HM1] (PORT.FILLING ASSY)
No specific	1	NITROGEN COMPRESSED SOURCE - GROUND
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )
FOR [5769HM2] (PORT.FILLING ASSY)
No specific	1	NITROGEN COMPRESSED SOURCE - GROUND
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GEE1)	Synthetic Oil base Grease-Fuel and Oxidized Environment Fluorinated -
FOR [5769HM] (FILL PORT-OXY SYS)
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
(Material No.14SBA1)	Textile-Lint free Cotton -
FOR [5769HM1] (PORT.FILLING ASSY)
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
(Material No.14SBA1)	Textile-Lint free Cotton -
FOR [5769HM2] (PORT.FILLING ASSY)
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
123	NOSE GEAR WELL
125	LATERAL AVIONIC COMPARTMENT
812

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	SLEEVE	AIPC 35-11-01-02-020

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 35-00-00-860-001-A	Special Precautions When Working on a Gaseous Oxygen System
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Oxygen Filling Port ** ON A/C NOT FOR ALL
Oxygen Filling Port ** ON A/C NOT FOR ALL
FOR [5769HM] (FILL PORT-OXY SYS)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
FOR [5769HM1] (PORT.FILLING ASSY)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
FOR [5769HM2] (PORT.FILLING ASSY)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque

3. Job Set-up
Subtask 35-11-42-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Obey the special precautions when you do work on a gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
(2) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(3) In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU:

Make sure that the CREW SUPPLY pushbutton switch is released (OFF legend is on).
Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the oxygen system.

(4) Make sure that the manual shutoff valve(s) of the crew oxygen-storage cylinder(s) are in the closed position.
(5) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to open the manual shutoff valve(s) of the crew oxygen-storage cylinder(s).
(6) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at access door 812.
(7) Make sure that access door 812 is open (Ref. AMM TASK 52-41-00-010-002).

Subtask 35-11-42-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

4. Procedure
Subtask 35-11-42-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Oxygen Filling Port (5769HM)

NOTE: Only use Synthetic Oil base Grease-Fuel and Oxidized Environment Fluorinated - (Material No.03GEE1) on the thread of the nut or on the flared portion of the tube. Apply only a thin layer of the compound on the first three male threads.

(1) Install the oxygen filling port (2) in its support and attach it with the screws (1) and the nuts (3).
(2) Remove the blanking cap from the tube (5).
(3) Install the new AIPC 35-11-01-02-020 SLEEVE (4) on the tube (5).
(4) Remove the blanking cap from the oxygen filling port (2).
(5) Install and tighten the tube (5) on the oxygen filling port (2).

Subtask 35-11-42-790-050-B ** ON A/C NOT FOR ALL

B. Leak Check of the Filling Line
(1) FOR [5769HM] (FILL PORT-OXY SYS)
(a) In the avionics compartment, make sure that:

The manual shutoff valve of crew oxygen-storage cylinder 5750HM is fully closed.
The WARNING NOTICE(S) is(are) in position to tell persons not to operate the manual shutoff valve of crew oxygen-storage cylinder 5750HM.

(b) Remove the plug assembly (6) from the oxygen filling port (2) (5769HM).
(c) Connect a NITROGEN COMPRESSED SOURCE - GROUND to the oxygen filling port (2) (5769HM).
(d) Slowly pressurize the oxygen filling port (2) (5769HM) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
(e) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen filling port (2) (5769HM) and the oxygen pressure regulator/transmitter (4HT).
1 If you find leak(s), use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
2 Do a check of the torque(s) of the connection(s).
3 Slowly pressurize the oxygen filling port (2) (5769HM) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
4 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen filling port (2) (5769HM) and the oxygen pressure regulator/transmitter (4HT).
(f) Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connections with a Textile-Lint free Cotton - (Material No.14SBA1) .
(g) Use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
(h) Remove the NITROGEN COMPRESSED SOURCE - GROUND from the oxygen filling port (2) (5769HM).
(i) Install the plug assembly (6) on the oxygen filling port (2) (5769HM).
(j) TORQUE the plug assembly (6) to between 0.275 and 0.225 m.N (2.43 and 1.99 lbf.in )

.
(k) Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(l) Open the manual shutoff valve.

CAUTION: WHEN YOU OPEN THE MANUAL SHUTOFF VALVE ON THE CREW OXYGEN-STORAGE CYLINDER, MAKE SURE THAT:

YOU TURN IT VERY SLOWLY
YOU TURN IT UNTIL IT IS FULLY OPEN.

IF YOU TURN THE MANUAL SHUTOFF VALVE TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT. IF THE MANUAL SHUTOFF VALVE IS NOT FULLY OPEN, THE OXYGEN PRESSURE DATA CAN BE INCORRECT.

1 Slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM).

Subtask 35-11-42-420-052-B ** ON A/C NOT FOR ALL

C. Installation of the Oxygen Filling Port
(1) Do a visual inspection and clean the component interface and/or the adjacent area.
(2) Remove the oxygen filling port (3) from the BAG - VINYL, SEALED.
(3) Remove the CAP - BLANKING, APPROVED FOR USE WITH OXYGEN from the outlet side of the oxygen filling port (3).
(4) Remove the disconnected end of the tube (6) from the BAG - VINYL, SEALED.
(5) Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the tube (6).
(6) Put the oxygen filling port (3) in position on its support plate (4).
(7) Tighten the coupling nut of the tube (6) with your hands on the oxygen filling port (3).
(8) Align the holes of the oxygen filling port (3) with the holes of the support plate (4).
(9) Install the screws (2) and nuts (5) and tighten them.
(10) Install the tube (6) on the oxygen filling port (3) as follows:

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT EQUIPMENT FROM FLEXIBLE HOSES AND RIGID TUBING. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL CAUSE DAMAGE TO THE HOSES AND TUBES.

(a) Hold the oxygen filling port (3) with a WRENCH - STANDARD.
(b) TORQUE the coupling nut of the tube (6) to between 2.14 and 1.52 m.daN (15.78 and 11.21 lbf.ft )

.
(c) Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(11) Remove the CAP - BLANKING, APPROVED FOR USE WITH OXYGEN from the inlet side of the oxygen filling port (3).
(12) Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the nut of the plug assembly (1).
(13) Install the plug assembly (1) on the oxygen filling port (3).
(14) TORQUE the plug assembly (1) to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )

Subtask 35-11-42-790-050-A ** ON A/C NOT FOR ALL

D. Leak Checks
(1) FOR [5769HM1] (PORT.FILLING ASSY)
(a) In the avionics compartment, make sure that:

The manual shutoff valve of the crew oxygen-storage cylinder 5750HM1 is fully closed.
The WARNING NOTICE(S) is in position to tell persons not to operate the manual shutoff valve of the crew oxygen-storage cylinder 5750HM1.

(b) Remove the plug assembly (1) from the oxygen filling port (3) (5769HM1).
(c) Connect a NITROGEN COMPRESSED SOURCE - GROUND to the oxygen filling port (3) (5769HM1).
(d) Slowly pressurize the oxygen filling port (3) (5769HM1) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
(e) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen filling port (3) (5769HM1) and the oxygen pressure regulator/transmitter (4HT).
1 If you find leak(s), use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
2 Do a check of the torque(s) of the connection(s).
3 Slowly pressurize the oxygen filling port (3) (5769HM1) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
4 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen filling port (3) (5769HM1) and the oxygen pressure regulator/transmitter (4HT).
(f) Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connections with a Textile-Lint free Cotton - (Material No.14SBA1) .
(g) Use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
(h) Remove the NITROGEN COMPRESSED SOURCE - GROUND from the oxygen filling port (3) (5769HM1).
(i) Install the plug assembly (1) on the oxygen filling port (3) (5769HM1).
(j) TORQUE the plug assembly (1) to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )

.
(k) Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(l) Open the manual shutoff valve.

CAUTION: WHEN YOU OPEN THE MANUAL SHUTOFF VALVE ON THE CREW OXYGEN-STORAGE CYLINDER, MAKE SURE THAT:

YOU TURN IT VERY SLOWLY
YOU TURN IT UNTIL IT IS FULLY OPEN.

IF YOU TURN THE MANUAL SHUTOFF VALVE TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT. IF THE MANUAL SHUTOFF VALVE IS NOT FULLY OPEN, THE OXYGEN PRESSURE DATA CAN BE INCORRECT.

1 Slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM1).
(2) FOR [5769HM2] (PORT.FILLING ASSY)
(a) In the avionics compartment, make sure that:

The manual shutoff valve of the crew oxygen-storage cylinder 5750HM2 is fully closed.
The WARNING NOTICE(S) is in position to tell persons not to operate the manual shutoff valve of the crew oxygen-storage cylinder 5750HM2.

(b) Remove the plug assembly (1) from the oxygen filling port (3) (5769HM2).
(c) Connect a NITROGEN COMPRESSED SOURCE - GROUND to the oxygen filling port (3) (5769HM2).
(d) Slowly pressurize the oxygen filling port (3) (5769HM2) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
(e) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen filling port (3) (5769HM2) and the oxygen pressure regulator/transmitter (4HT2).
1 If you find leak(s), use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
2 Do a check of the torque(s) of the connection(s).
3 Slowly pressurize the oxygen filling port (3) (5769HM2) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
4 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen filling port (3) (5769HM2) and the oxygen pressure regulator/transmitter (4HT2).
(f) Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connections with a Textile-Lint free Cotton - (Material No.14SBA1) .
(g) Use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
(h) Remove the NITROGEN COMPRESSED SOURCE - GROUND from the oxygen filling port (3) (5769HM2).
(i) Install the plug assembly (1) on the oxygen filling port (3) (5769HM2).
(j) TORQUE the plug assembly (1) to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )

.
(k) Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(l) Open the manual shutoff valve.

CAUTION: WHEN YOU OPEN THE MANUAL SHUTOFF VALVE ON THE CREW OXYGEN-STORAGE CYLINDER, MAKE SURE THAT:

YOU TURN IT VERY SLOWLY
YOU TURN IT UNTIL IT IS FULLY OPEN.

IF YOU TURN THE MANUAL SHUTOFF VALVE TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT. IF THE MANUAL SHUTOFF VALVE IS NOT FULLY OPEN, THE OXYGEN PRESSURE DATA CAN BE INCORRECT.

1 Slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM2).

Subtask 35-11-42-865-052-A ** ON A/C NOT FOR ALL

E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

Subtask 35-11-42-870-050-A ** ON A/C NOT FOR ALL

F. Bleeding of the Oxygen System(s)
(1) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Push the CREW SUPPLY pushbutton switch (the OFF legend goes off).

(2) FOR [5769HM1] (PORT.FILLING ASSY)
(a) On the Captain oxygen-mask stowage-box, push and hold the PRESS TO TEST AND RESET control button.
At the same time, push and hold the PRESS TO TEST/EMERGENCY knob on the mask regulator.
1 Keep the PRESS TO TEST AND RESET control button and the PRESS TO TEST/EMERGENCY knob pushed for a minimum of three seconds.

NOTE: During this time, the flow rate indicator changes from yellow to black and the volume of the sound of the oxygen flow decreases.

2 When the flow rate indicator is black and when you can no longer hear the sound of the oxygen flow:

Release the PRESS TO TEST/EMERGENCY knob.
Release the PRESS TO TEST AND RESET control button.

3 Check of the PRESS TO TEST/EMERGENCY knob position

WARNING: MAKE SURE THAT THE PRESS TO TEST/EMERGENCY KNOB IS NOT IN THE EMERGENCY POSITION. IF IT IS IN THE EMERGENCY POSITION, THERE CAN BE A LEAK OF OXYGEN.

a Make sure that the PRESS TO TEST/EMERGENCY knob is not in the EMERGENCY position.
(b) Do this bleeding again for the Third Occupant oxygen-mask.
(3) FOR [5769HM2] (PORT.FILLING ASSY)
(a) On the First-Officer oxygen-mask stowage-box, push and hold the PRESS TO TEST AND RESET control button.
At the same time, push and hold the PRESS TO TEST/EMERGENCY knob on the mask regulator.
1 Keep the PRESS TO TEST AND RESET control button and the PRESS TO TEST/EMERGENCY knob pushed for a minimum of three seconds.

NOTE: During this time, the flow rate indicator changes from yellow to black and the volume of the sound of the oxygen flow decreases.

2 When the flow rate indicator is black and when you can no longer hear the sound of the oxygen flow:

Release the PRESS TO TEST/EMERGENCY knob.
Release the PRESS TO TEST AND RESET control button.

3 Check of the PRESS TO TEST/EMERGENCY knob position

WARNING: MAKE SURE THAT THE PRESS TO TEST/EMERGENCY KNOB IS NOT IN THE EMERGENCY POSITION. IF IT IS IN THE EMERGENCY POSITION, THERE CAN BE A LEAK OF OXYGEN.

a Make sure that the PRESS TO TEST/EMERGENCY knob is not in the EMERGENCY position.
(b) Do this bleeding again for the Fourth Occupant oxygen-mask.
(4) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Release the CREW SUPPLY pushbutton switch (the OFF legend comes on).

Subtask 35-11-42-870-050-C ** ON A/C NOT FOR ALL

F. Bleeding of the Oxygen System(s)
(1) FOR [5769HM] (FILL PORT-OXY SYS)
(a) In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU:

Remove the WARNING NOTICE(S).
Push the CREW SUPPLY pushbutton switch (the OFF legend goes off).

(b) On one oxygen-mask stowage-box, push and hold the PRESS TO TEST AND RESET control button.
At the same time, push and hold the PRESS TO TEST/EMERGENCY knob on the mask regulator.
1 Keep the PRESS TO TEST AND RESET control button and the PRESS TO TEST/EMERGENCY knob pushed for a minimum of three seconds.

NOTE: During this time, the flow rate indicator changes from yellow to black and the volume of the sound of the oxygen flow decreases.

2 When the flow rate indicator is black and when you can no longer hear the sound of the oxygen flow:

Release the PRESS TO TEST/EMERGENCY knob.
Release the PRESS TO TEST AND RESET control button.

3 Check of the PRESS TO TEST/EMERGENCY knob position:

WARNING: MAKE SURE THAT THE PRESS TO TEST/EMERGENCY KNOB IS NOT IN THE EMERGENCY POSITION. IF IT IS IN THE EMERGENCY POSITION, THERE CAN BE A LEAK OF OXYGEN.

a Make sure that the PRESS TO TEST/EMERGENCY knob is not in the EMERGENCY position.
(c) Do this bleeding procedure for all the oxygen-mask stowage boxes.
(d) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Release the CREW SUPPLY pushbutton switch (the OFF legend comes on).

5. Close-up
Subtask 35-11-42-860-051-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Very slowly open the valve of the cylinder (5750HM) 3.5 to 4 turns.
(3) Let the pressure become stable. This occurs after approximately 90 seconds.
(4) Fully open the valve of the cylinder.

Subtask 35-11-42-860-051-C ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Turn the valve of the cylinder (5750 HM) very slowly until it is fully open.

Subtask 35-11-42-860-051-E ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

CAUTION: WHEN YOU OPEN THE MANUAL SHUTOFF VALVE ON THE CREW OXYGEN-STORAGE CYLINDER, MAKE SURE THAT:

YOU TURN IT VERY SLOWLY
YOU TURN IT UNTIL IT IS FULLY OPEN.

IF YOU TURN THE MANUAL SHUTOFF VALVE TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT. IF THE MANUAL SHUTOFF VALVE IS NOT FULLY OPEN, THE OXYGEN PRESSURE DATA CAN BE INCORRECT.

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Very slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM1).
(3) Very slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM2).

Subtask 35-11-42-410-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close access door 812.
(2) Remove the access platform(s).
(3) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

Subtask 35-11-42-410-050-B ** ON A/C NOT FOR ALL

B. Close Access
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(2) Close access door 812 (Ref. AMM TASK 52-41-00-410-002).
(3) In the avionics compartment:
(a) Remove the WARNING NOTICE(S).
(4) In the cockpit:
(a) Remove the WARNING NOTICE(S).
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 01:04:03 UTC