Rig the Bleed Air Ducts

TASK 36-11-49-820-010-A
Rig the Bleed Air Ducts

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 85 and 75 lbf.in (0.96 and 0.85 m.daN )
No specific	Torque wrench: range to between 126.5 and 103.5 lbf.in (1.43 and 1.17 m.daN )
No specific	Torque wrench: range to between 145 and 135 lbf.in (1.64 and 1.53 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-126)	lockwire

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

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 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-40-11-911-014-A	Locking Devices General Information
TASK 71-00-00-710-017-B	Ground Test Requirements after Power Plant Module/Component Repair or Replacement Procedures
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Bleed Air Duct Rigging

3. Job Set-up
Subtask 36-11-49-861-070-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-49-941-082-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) On the AIR COND panel 30VU:

make sure that the 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),
put a WARNING NOTICE(S) to tell persons not to operate the pneumatic system.

(3) On the ENG panel 115VU:

put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).

(4) On the HP ground connector:

Put a WARNING NOTICE(S) to tell persons not to pressurize the pneumatic system.

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

make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off,
put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 36-11-49-010-100-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) in position below the engine.

Subtask 36-11-49-040-081-A ** ON A/C NOT FOR ALL

D. Deactivate the Thrust Reverser Hydraulic Control Unit

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-49-010-101-A ** ON A/C NOT FOR ALL

E. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-49-210-060-A ** ON A/C NOT FOR ALL

F. Inspection of the Couplings and the Pressure Regulating Valve
(1) Make sure that the couplings (1), (3), (5), (7), (9) and (13) are loosened but are sufficiently tight to hold the ducts (2), (4) and (8) in position.

Bleed Air Duct Rigging ** ON A/C NOT FOR ALL

(2) Make sure that the bleed pressure regulating valve (12) is installed so that the valve points forward.

4. Procedure
Subtask 36-11-49-820-052-A ** ON A/C NOT FOR ALL

A. Adjust the ducts (2), (4) and (8) to get the correct clearance. Set the length of the connecting rod assemblies (25) and (27) for the initial installation.
(1) Set the total length of the connecting rod (25) to 6.46 in. (164.0 mm).

PRE SBN 70-0696

(2) Set the total length of the connecting rod (27) to 3.31 in. (84.0 mm).

END OF PRE SBN 70-0696

POST SBN 70-0696

POST SBN 70-0439

(3) Set the total length of the connecting rod (27) to 3.25 in. (82.5 mm).

END OF POST SBN 70-0696

END OF POST SBN 70-0439

(4) If it is necessary, turn the ducts to get the correct clearance.
(5) If it is necessary, adjust the length of the connecting rods (25) and (27) so that the bearings turn freely.
(6) Do not cause the ducts to be stressed.

NOTE: Do not lock the connecting rods locknuts at this time.

Subtask 36-11-49-220-050-A ** ON A/C NOT FOR ALL

B. Do a Check of the Clearance around the Ducts, Valves and Tubes
(1) Measure the distance between the bleed pressure regulating valve (12) and the engine casing flange FJ at PPS 117.9. The distance must be 0.39 in. (10.0 mm).
(2) Measure the distance between the HP valve (6) and the engine casing.
The distance must be 0.24 in. (6.0 mm).
(3) Measure the clearance around the ducts (2), (4) and (8). The minimum clearance around the ducts must be 0.39 in. (10.0 mm).

Subtask 36-11-49-420-072-A ** ON A/C NOT FOR ALL

C. Torque the Couplings and Connect the Pressure Indicating Tube
(1) Torque the couplings (1), (3), (5), (7), (9) and (13).
(a) TORQUE the coupling (1) to between 85 and 75 lbf.in (0.96 and 0.85 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(b) Hit the coupling lightly in different places around the outer edge with a mallet that is not metallic.
(c) Do steps (a) and (b) again two more times.
(d) TORQUE the coupling (1) for the last time to between 85 and 75 lbf.in (0.96 and 0.85 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(e) Do steps (a) thru (d) again for the couplings (5), (7), (9), (12) and (13).
(2) Connect the pressure indicating tube (11).
(a) Hold the union (10). Connect the nut of the pressure indicating tube (11) to the union (10).
(b) TORQUE the nut of the pressure indicating tube (11) to between 145 and 135 lbf.in (1.64 and 1.53 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(c) Safety the nut of the pressure indicating tube (11) to the union (10) with lockwire (Material No.V02-126) (Ref. AMM TASK 70-40-11-911-014).

Subtask 36-11-49-220-051-A ** ON A/C NOT FOR ALL

D. Do a Check of Different Clearances and of Connecting Rods
(1) Do a check again of the clearances around the ducts, valves and tubes (Ref. step B.).
(2) Do a check of the connecting rods (25) and (27).
(a) Make sure, with the use of the safety holes, that there are sufficient bearing threads engaged in the connecting rods.

Subtask 36-11-49-420-073-A ** ON A/C NOT FOR ALL

E. Safety the connecting rods (25) and (27).
(1) TORQUE the two nuts (29) to between 126.5 and 103.5 lbf.in (1.43 and 1.17 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(2) Tighten and lock the connecting rod locknuts (24), (26) and (28).

5. Close-up
Subtask 36-11-49-410-089-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-49-440-066-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-49-410-090-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 36-11-49-710-053-A ** ON A/C NOT FOR ALL

D. Do an operational test of the cabin bleed air system (Ref. AMM TASK 71-00-00-710-017).

Subtask 36-11-49-862-071-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 12:38:38 UTC