Installation of the Yellow Engine-2 Thrust-Reverser Case-Drain Check-Valve

TASK 29-13-35-400-803-A
Installation of the Yellow Engine-2 Thrust-Reverser Case-Drain Check-Valve

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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.

ZONE: 423
FIN: 3008KM2 ** 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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	2	CAP - PROTECTION
No specific	1	CONTAINER 20L (5 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	AR	WRENCH - STANDARD
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
423	UPPER FWD PYLON
195BB, 198CB, 423AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 27-00-00-080-002-A	Removal of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-13-00-710-002-A	Operational Test of the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 54-52-11-000-805-A	Removal of the Access Skin Panels
TASK 54-52-11-400-805-A	Installation of the Access Skin Panels
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
Yellow Engine-2 Thrust-Reverser Case-Drain Check-Valve

3. Job Set-up
Subtask 29-13-35-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-10-00-864-002).
(2) Make sure that the reservoir of the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the slats are in the fully retracted position (Ref. AMM TASK 27-50-00-866-009).

Subtask 29-13-35-941-057-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate this pushbutton switch.

(2) Make sure that WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:

On the HYD section of panel 40VU
On the ground service panel of the Yellow hydraulic system.

(3) Make sure that a WARNING NOTICE(S) is in position on access door 195BB to tell persons not to pressurize the reservoir of the Yellow hydraulic system.
(4) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(5) On FLAPS panel 114VU:

Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
Make sure that a WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

Subtask 29-13-35-040-054-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 29-13-35-410-060-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the fan cowl doors are closed (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 29-13-35-010-058-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the pylon.
(2) Make sure that access panel 423AL is removed (Ref. AMM TASK 54-52-11-000-805).

4. Procedure
Subtask 29-13-35-420-053-A ** ON A/C NOT FOR ALL

A. Installation of the Thrust-Reverser Case-Drain Check-Valve

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the hydraulic line end-fittings are serviceable.
(4) Make sure that a CONTAINER 20L (5 USGAL) is in position below the drain mast, on the bottom of the engine at the 6 o'clock position, to collect the remaining hydraulic fluid.
(5) Make sure that a Textile-Lint free Cotton - (Material No.14SBA1) is in position below the connections of the thrust-reverser case-drain check-valve (2) with the T-duct (1) and pipe (3).
(6) Remove the CAP - PROTECTION from the two ends of the thrust-reverser case-drain check-valve (2).
(7) Install the thrust-reverser case-drain check-valve (2) to the T-duct (1).
(8) TORQUE the coupling nut of the thrust-reverser case-drain check-valve (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(9) Remove the PLUG-BLANKING from each disconnected line end.
(10) Put the pipe (3) in position between the check valve (2) and the T-fitting.
(11) Connect the coupling nut of the pipe (3) to the thrust-reverser case-drain check-valve (2).
(12) Connect the coupling nut of the pipe (3) to the T-fitting.
(13) TORQUE the coupling nut of the pipe (3) that is connected to the thrust-reverser case-drain check-valve (2) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(14) Put a WRENCH - STANDARD on the flats of the T-fitting body to hold it, and TORQUE the coupling nut of the pipe (3) that is connected to the T-fitting to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(15) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Subtask 29-13-35-710-053-A ** ON A/C NOT FOR ALL

B. Operational Test
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the CONTAINER 20L (5 USGAL).
(3) Do the operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(4) After the dry-motoring, make sure that there were no leaks from the hydraulic connections.
(5) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001).

5. Close-up
Subtask 29-13-35-410-053-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install access panel 423AL (Ref. AMM TASK 54-52-11-400-805).

Subtask 29-13-35-010-067-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 29-13-35-440-052-A ** ON A/C NOT FOR ALL

C. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 29-13-35-410-054-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Close access doors 198CB and 195BB.
(3) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever (Ref. AMM TASK 27-00-00-080-002).
(4) Remove the WARNING NOTICE(S).
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:20:24 UTC