Installation of the Top Case Drain Hose/Tube Assembly

TASK 29-11-49-400-003-A
Installation of the Top Case Drain Hose/Tube Assembly

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

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.

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	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - TORQUE
No specific	Torque wrench: range to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )
No specific	Torque wrench: range to between 1.64 and 1.53 m.daN (12.09 and 11.28 lbf.ft )
No specific	Torque wrench: range to between 2.77 and 2.43 m.daN (20.43 and 17.92 lbf.ft )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195BB
FOR [1000EM1] (ENGINE-1)
437AL

C. 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 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-00-710-001-A	Operational Test of the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Top Case Drain Hose/Tube Assembly
FOR [1000EM1] (ENGINE-1)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors

3. Job Set-up
Subtask 29-11-49-860-070-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(2) Make sure that the Green hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Green hydraulic system:

on the ground service panel 197CB.

(4) Make sure that the WARNING NOTICE(S) is (are) in position on the access door 195BB to tell persons not to pressurize the Green hydraulic reservoir.

Subtask 29-11-49-941-068-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:

make sure that WARNING NOTICE(S) is (are) in position to tell persons not to start the engine.

(2) Make sure that the engine 1 (2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Green hydraulic system:

in the cockpit, on the HYD section of the overhead panel 40VU.

(4) On the overhead maintenance panel 50VU:

make sure that the ON legend of the ENG/FADEC GND PWR/1 pushbutton switch is off.

(5) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to energize the FADEC 1(2).
(6) Make sure that the CONTAINER 5 L (1.32 USGAL) is below the suction-hose adapter connection to the hydraulic pump.

Subtask 29-11-49-865-055-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
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34

Subtask 29-11-49-010-068-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the left fan cowl door is open:
(a) FOR [1000EM1] (ENGINE-1)
make sure that the door 437AL is open (Ref. AMM TASK 71-13-00-010-040).
(2) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position at the engine.

4. Procedure
Subtask 29-11-49-420-059-A ** ON A/C NOT FOR ALL

A. Installation of the Top Case-Drain Hose/Tube Assembly
(1) Remove the protective covers from the drain hose/tube (20), filter assembly, pressure-relief valve tube, and fluid disconnect panel.
(2) Loosely connect the top case-drain hose/tube (20) to the fluid disconnect panel. Do not TORQUE the coupling nut at this time.
(3) Loosely connect the drain hose/tube (20) to the hydraulic filter assembly. Do not TORQUE the coupling nut at this time.
(4) Attach the drain hose/tube (20) to the top bracket with the clamp (15), bolt (5) and washer (10). Do not TORQUE the bolt (5) at this time.
(5) Attach the drain hose/tube (20) to the top mid-channel with the clamp (15), bolt (5) and washer (10). Do not TORQUE the bolts (5) at this time.
(6) Attach the drain hose/tube (20) to the bottom mid-channel with the clamp (15), bolt (25) and washer (10). Do not TORQUE the bolts (25) at this time.
(7) Connect the pressure-relief valve tube to the tee-fitting on the drain hose/tube (20). Do not TORQUE the coupling nut at this time.
(8) Make sure that the top case-drain hose/tube (20) is in the correct position on the engine.

NOTE: You can use a second WRENCH - TORQUE to hold the fittings when you TORQUE the coupling nuts. This prevents damage to the hose/tube assemblies.

(9) TORQUE the drain hose/tube (20) coupling nuts to between 2.77 and 2.43 m.daN (20.43 and 17.92 lbf.ft )

.
(10) TORQUE the coupling nut of the pressure-relief valve tube to between 1.64 and 1.53 m.daN (12.09 and 11.28 lbf.ft )

.
(11) Torque the bolts as follows:

CAUTION: YOU MUST TORQUE THE BOLTS IN THE SEQUENCE GIVEN. IF YOU DO NOT TORQUE THE BOLTS IN SEQUENCE, YOU CAN CAUSE DAMAGE TO THE CASE DRAIN HOSE/TUBE ASSEMBLY.

(a) TORQUE the bolt (5) on the top mid-channel to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(b) TORQUE the bolt (25) on the bottom mid-channel to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(c) TORQUE the bolt (5) on the top bracket to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(12) Remove the container.

Subtask 29-11-49-865-063-A ** ON A/C NOT FOR ALL

B. 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
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34

Subtask 29-11-49-710-060-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do an operational test of the Green hydraulic system (Ref. AMM TASK 29-11-00-710-001).
(2) During the dry motoring of the engine 1, make sure that there are no leaks from the case drain hose/tube.
(3) Make sure that the level of the hydraulic fluid in the Green reservoir is correct. If necessary, fill the reservoir: (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).

5. Close-up
Subtask 29-11-49-860-088-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance configuration
(1) Remove the access platform(s).
(2) Make sure that the work area is clean and clear of tools and other items.

Subtask 29-11-49-410-061-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the left fan cowl door:
(a) FOR [1000EM1] (ENGINE-1)
close the door 437AL (Ref. AMM TASK 71-13-00-410-040).
(2) Close the door 195BB.

Subtask 29-11-49-942-062-A ** ON A/C NOT FOR ALL

C. Remove the safety precautions
(1) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 08:00:23 UTC