Installation of the Fan-Air Valve Control-Thermostat

TASK 36-11-43-400-001-A
Installation of the Fan-Air Valve Control-Thermostat

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

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

ZONE: 413
ZONE: 423
FIN: 7170HM1 ** ON A/C NOT FOR ALL
FIN: 7170HM2 ** 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	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.6 and 1.32 m.daN (141.59 and 116.81 lbf.in )
No specific	Torque wrench: range to between 1.63 and 1.52 m.daN (12.02 and 11.21 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03PBB1)	Lubricant-Anti Seize High Temp. -
(Material No.03QBC1)	Dry lubricant-General Assembly Molybdenum Disulfide & Silicone -
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
413	UPPER FWD PYLON
423	UPPER FWD PYLON
FOR [7170HM1] (THERMOSTAT-FAN AIR VALVE CTL)
413DT
413CL, 413DL, 414CR
FOR [7170HM2] (THERMOSTAT-FAN AIR VALVE CTL)
423CL, 423DL, 424CR
423DT

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	PACKING	AIPC 36-11-06-06-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-21-12-911-001-A	Tightening Torques for Pipe Unions (not for OXYGEN Unions)
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 24-41-00-862-002-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 36-12-00-860-001-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-002-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 36-22-00-790-001-A	Leak Check on all the Bleed Air Ducts and the Packs Components
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
Fan-Air Valve Control-Thermostat ** ON A/C NOT FOR ALL
Fan-Air Valve Control-Thermostat ** ON A/C NOT FOR ALL
Fan-Air Valve Control-Thermostat ** ON A/C NOT FOR ALL
Fan-Air Valve Control-Thermostat ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-11-43-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that engine 1(2) shutdown for a minimum of five minutes before you do this procedure.
(3) In the cockpit, on AIR COND panel 30VU:

Make sure that ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.

(4) On ENG panel 115VU:

Make sure that the WARNING NOTICE(S) is in position to tell persons not to start engine 1(2).

(5) On the HP ground connector:

Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

(6) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of ENG/FADEC GND PWR 1(2) pushbutton-switch is off.
Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

(7) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below the engine.

Subtask 36-11-43-010-053-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the access doors are open:
(a) FOR [7170HM1] (THERMOSTAT-FAN AIR VALVE CTL)
413CL 414CR 413DL
(b) FOR [7170HM2] (THERMOSTAT-FAN AIR VALVE CTL)
423CL 424CR 423DL.

Subtask 36-11-43-010-053-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the access door is open:
(a) FOR [7170HM1] (THERMOSTAT-FAN AIR VALVE CTL)
413DT
(b) FOR [7170HM2] (THERMOSTAT-FAN AIR VALVE CTL)
423DT.

Subtask 36-11-43-865-057-A ** ON A/C NOT FOR ALL

C. 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	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

4. Procedure
Subtask 36-11-43-420-052-H ** ON A/C NOT FOR ALL

A. Installation of the Fan-Air Valve Control-Thermostat
(1) If you use the APU to energize the electrical circuits, stop the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM TASK 49-00-00-860-006)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

(2) In the cockpit, on the SD bleed page:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

WARNING: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Clean the component interfaces and the adjacent area.
(5) Do a visual inspection of the component interface and/or the adjacent area.
(6) Remove the blanking plugs from the disconnected line ends.
(7) Install a new AIPC 36-11-06-06-050 PACKING (7) on the thermostat (3).
(8) Install the thermostat (3) on its support (6).
(9) Install the nut plate (4).
(10) Install the washers (5), the bolts (2) and (8).
(11) TORQUE the bolts (2) and (8) to between 1.6 and 1.32 m.daN (141.59 and 116.81 lbf.in )

.
(12) Do the steps that follow to connect the sense line (1):
(a) Make sure that the sense line (1) and the union (9) are serviceable.
(b) Remove the blanking plug from the union (9).
(c) Clean the threads of the union (9).

CAUTION: APPLY ONLY A THIN LAYER OF GREASE TO THE THREADS OF THE UNIONS, AND REMOVE THE UNWANTED GREASE TO PREVENT CONTAMINATION OF THE HOSE ASSEMBLY. IF YOU USE TOO MUCH GREASE, IT CAN CAUSE CLOGGING OF THE HOSE ASSEMBLY OR DAMAGE TO THE RELATED COMPONENTS.

(d) Apply a thin layer of Dry lubricant-General Assembly Molybdenum Disulfide & Silicone - (Material No.03QBC1) or Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the union (9).
(e) Remove the blanking plug from the sense line (1).
(f) Connect the sense line (1) to the union (9).

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT THE PNEUMATIC LINES ON UNIONS.

(13) TORQUE the sense line (1) to between 1.63 and 1.52 m.daN (12.02 and 11.21 lbf.ft )

(Ref. AMM TASK 20-21-12-911-001).

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.

(14) Safety the sense line (1) with 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.

Subtask 36-11-43-720-050-A ** ON A/C NOT FOR ALL

B. Leak Test
(1) Pressurization of the bleed system
(a) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-002) or with the APU (Ref. AMM TASK 36-12-00-860-001).

NOTE: If you pressurize the bleed system through the HP ground connector, the supplied pressure 30 psi (2.07 bar) must be stable.

(2) Make sure that there are no leaks at the sense line connection and at the junction between the fan air valve control thermostat and the duct (Ref. AMM TASK 36-22-00-790-001).

5. Close-up
Subtask 36-11-43-865-055-A ** ON A/C NOT FOR ALL

A. 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	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

Subtask 36-11-43-410-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access doors:
(a) FOR [7170HM1] (THERMOSTAT-FAN AIR VALVE CTL)
413CL 414CR 413DL
(b) FOR [7170HM2] (THERMOSTAT-FAN AIR VALVE CTL)
423CL 424CR 423DL.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 36-11-43-410-050-B ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door :
(a) FOR [7170HM1] (THERMOSTAT-FAN AIR VALVE CTL)
413DT
(b) FOR [7170HM2] (THERMOSTAT-FAN AIR VALVE CTL)
423DT.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 36-11-43-862-050-A ** ON A/C NOT FOR ALL

C. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002) or (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 12:37:35 UTC