Installation of the Pylon Hydraulic Tube Tee Connectors [IAE]

TASK 78-31-49-400-010-A
Installation of the Pylon Hydraulic Tube Tee Connectors

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** 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) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )
No specific	Torque wrench: range to between 300 and 270 lbf.in (3.39 and 3.05 m.daN )
No specific	Torque wrench: range to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )
IAE1N20049	2	PIN - LOCKOUT ACTUATOR

B. 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

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
11	PACKING	AIPC 78-31-49-00-000

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
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 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
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
TASK 78-32-44-400-010-A	Installation of the Left C-Duct Flexible Synchronous Cables and Tubes
TASK 78-32-74-400-010-A	Installation of the Right C-Duct Flexible Synchronous Cables and Tubes
Tee Connectors
Translating Sleeve Lockout

3. Job Set-up
Subtask 78-31-49-860-106-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 78-31-49-010-167-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-32-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-31-49-040-151-A ** ON A/C NOT FOR ALL

C. Make Sure That the Thrust Reverser are Deactivated:

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) Make sure that the thrust reverser Hydraulic-Control-Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-31-49-630-050-A ** ON A/C NOT FOR ALL

D. Remove the applicable caps from all the openings.

Subtask 78-31-49-410-115-A ** ON A/C NOT FOR ALL

E. Install the union to the pressure tee connector.

Tee Connectors ** ON A/C NOT FOR ALL

(1) Install the union (5) and a new AIPC 78-31-49-00-000 PACKING (11) into the port of the pressure tee connector (10).
(2) TORQUE the union to between 300 and 270 lbf.in (3.39 and 3.05 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

4. Procedure
Subtask 78-31-49-420-097-A ** ON A/C NOT FOR ALL

A. Install the tee connectors

Tee Connectors ** ON A/C NOT FOR ALL

(1) Put the return tee connector (2) in position on the pylon bracket (1).
(2) Install the tee connector (2) with the three bolts (4) and the three washers (3).
(3) Put the pressure tee connector (10) in position on the pylon bracket (1).
(4) Install the tee connector (10) with the three bolts (4) and the three washers (3).
(5) TORQUE the six bolts (4) to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(6) Connect the hydraulic tubes

Tee Connectors ** ON A/C NOT FOR ALL

(a) Connect the hydraulic pressure tube (9) to the pressure tee connector (10).
(b) Connect the hydraulic return tube (7) to the return tee connector (2).
(c) TORQUE the tube B-nuts (6) and (8) to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 78-31-49-410-116-A ** ON A/C NOT FOR ALL

B. Install the C-duct flexible synchronous cables and tubes
(1) Install the right C-duct upper flexible synchronous cables and tubes (Ref. AMM TASK 78-32-74-400-010).
(2) Install the left C-duct upper flexible synchronous cables and tubes (Ref. AMM TASK 78-32-44-400-010).

Subtask 78-31-49-410-117-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) 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 78-31-49-614-051-A ** ON A/C NOT FOR ALL

D. Pressurize the Hydraulic Systems:

WARNING: PRESSURIZATION OF THE HYDRAULIC SYSTEM CAN RESULT IN INADVERTENT THRUST REVERSER OPERATION. REMOVE ALL PERSONNEL FROM THE AREA AROUND THE THRUST REVERSER BEFORE THE HYDRAULIC SYSTEM IS PRESSURIZED. FAILURE TO COMPLY CAN RESULT IN INJURY TO PERSONNEL.

(1) Pressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
(2) Pressurize the applicable hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-10-00-863-002) or (Ref. AMM TASK 29-23-00-863-001).
(3) Check that there is no leaks at the pipe nut (8).

Subtask 78-31-49-440-102-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-49-942-050-A ** ON A/C NOT FOR ALL

F. Remove the WARNING NOTICE(S).

Subtask 78-31-49-870-050-A ** ON A/C NOT FOR ALL

G. Bleed the air from the hydraulic thrust reverser actuation system

Translating Sleeve Lockout ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT ALL CAUGHT AIR IS BLED FROM THE SYSTEM. IF YOU DO NOT DO THIS, CAUGHT AIR CAN CAUSE UNSATISFACTORY OPERATION OF THE TRANSLATING SLEEVES. TEN CYCLES OF TRANSLATING SLEEVE POWER EXTENSION AND RETRACTION WILL REMOVE ALL CAUGHT AIR FROM THE SYSTEM.

CAUTION: YOU MUST MOVE THE LOCK LEVERS OF THE TWO LOCKING ACTUATORS AFT TO THE UNLOCKED POSITION BEFORE YOU BLEED THE SYSTEM. IF YOU DO NOT DO THIS, UNEVEN OPERATION OF THE TRANSLATING SLEEVES CAN CAUSE DAMAGE TO THE SYSTEM.

(1) Move the lock levers (21) of the left and right locking actuators (20) aft to the unlocked position and install the IAE1N20049 PIN - LOCKOUT ACTUATOR (22), to hold the lock levers in the unlocked position.
(2) Operate the System:

WARNING: MAKE SURE THAT THERE ARE NO PERSONS IN THE AREA AROUND THE THRUST REVERSER BEFORE YOU DO A POWER EXTENSION OR RETRACTION OF THE TRANSLATING SLEEVES. THE TRANSLATING SLEEVES EXTEND AND RETRACT IN 4.5 SECONDS OR LESS AND CAN CAUSE INJURY AND DAMAGE.

(a) Operate the system through ten cycles of translating sleeve power extension and retraction (Ref. AMM TASK 78-31-00-710-041).

NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).

(3) Remove the Lockout Pins:

CAUTION: THE LOCKING ACTUATOR LOCK LEVERS MUST BE IN THE FORWARD LOCKED POSITION FOR FLIGHT OPERATION.

(a) Remove the lockout pins (IAE1N20049) (22) from the lock levers (21) of the left and right locking actuators (20) and move the lock levers forward to the locked position.
(4) Refill the green hydraulic reservoir for engine 1 (yellow hydraulic reservoir for engine 2) (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).

Subtask 78-31-49-790-050-A ** ON A/C NOT FOR ALL

H. Do a leak check of the pylon hydraulic tube tee connectors. No leaks are permitted.

5. Close-up
Subtask 78-31-49-410-118-A ** ON A/C NOT FOR ALL

A. Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

[Rev.10 from 2021] 2026.04.01 03:27:37 UTC