Installation of the Fuel Recirculation Pipe

TASK 28-16-00-400-001-A
Installation of the Fuel Recirculation Pipe

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

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: IF POSSIBLE, KEEP FUEL AND OIL AWAY FROM YOUR SKIN. USE PROTECTIVE CLOTHES. FUEL AND OIL CAN DRY YOUR SKIN AND CAUSE SKIN IRRITATION.

WARNING: BEFORE YOU OPEN PHC CIRCUIT BREAKERS 2DA1(2,3), OPEN PROBE HEATER CIRCUIT-BREAKERS 1DA1(2), 3DA1(2,3), 4DA1(2,3) AND 5DA1(2,3). IF YOU DO NOT OBEY THIS SEQUENCE: - THE PROBES WILL BECOME TOO HOT. - THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.

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 3M (10 FT)- ADJUSTABLE
No specific	1	PIN - LOCKING
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 37 and 30 m.N (27.29 and 22.12 lbf.ft )
No specific	Torque wrench: range to between 0.31 and 0.25 m.daN (27.43 and 22.12 lbf.in )
No specific	Torque wrench: range to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )
No specific	Torque wrench: range to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )
No specific	Torque wrench: range to between 3.87 and 3.22 m.daN (28.54 and 23.75 lbf.ft )
No specific	Torque wrench: range to between 4.64 and 3.87 m.daN (34.22 and 28.54 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
471BL
413EL, 424AR, 424CR, 424ER, 471AL, 482AR, 482BR, 482CR
415AL, 415AR, 415BL, 425AL, 425AR, 425BL, 451BL, 451DL, 451EL, 461DL, 461EL, 481BL
413AL, 413CL, 471CL
423AR, 423CR, 471DL, 481BR, 481CR, 481DR
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
37	SEAL	AIPC 28-16-06-01-120
37	SEAL	AIPC 28-16-86-01-070
5	SEAL	AIPC 28-16-86-01-070

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 20-21-11-911-001-A	Tightening Torques for Standard Threaded Fasteners
TASK 20-21-12-911-001-A	Tightening Torques for Pipe Unions (not for OXYGEN Unions)
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 26-21-41-400-001-E	Installation of the Engine Fire-Extinguisher Bottle
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-16-00-790-001-A	Leak Test of the Fuel Recirculation Cooling-System
TASK 28-16-00-790-002-A	Leak Test of the Fuel Recirculation Cooling-System
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 36-11-54-400-802-A	Installation of the Fan Air-Valve Actuator
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-802-A	Installation of the Pylon Lateral Access-Doors
TASK 54-52-11-000-002-A	Removal of the Access Panels
TASK 54-52-11-000-002-B	Removal of the Access Panels
TASK 54-52-11-400-002-A	Installation of the Access Panels
TASK 54-52-11-400-002-B	Installation of the Access Panels
TASK 54-53-11-000-002-A	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-002-A	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
TASK 71-00-00-720-811-A	Test No. 3A - Idle Power Test
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-11-50-360-001-A-01	Leak check of the Fuel Return Valve.
TASK 73-11-50-360-002-A	Leak Check and Functional Test of the Fuel Return Valve
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Fuel Recirculation Pipe - Location and Detail ** ON A/C NOT FOR ALL
Fuel Recirculation Pipe - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-16-00-941-061-A

A. Safety Precautions
(1) Make sure that the engine (1) and (2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) Make sure that a WARNING NOTICE(S) in position is in the cockpit to tell persons not to start the engine.
(3) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off, and put a WARNING NOTICE(S) to tell persons not to use it.
(4) Make sure that the APU BLEED pushbutton switch is released (on legend OFF) and install a WARNING NOTICE(S) to tell persons not to use it.

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(5) Make sure that the fuel safety procedure instructions are obeyed (Ref. AMM TASK 28-00-00-910-001).
(6) Make sure that the hydraulic safety procedure instructions are obeyed (Ref. AMM TASK 29-00-00-910-002).

Subtask 28-16-00-860-053-A

B. Aircraft Maintenance Configuration
(1) Make sure that the applicable aircraft wing-tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
(4) Make sure that the hydraulic reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 28-16-00-865-060-A

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 28-16-00-010-058-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that an access platform is in position:

for the left pylon at zone 410
for the right pylon at zone 420.

(2) Make sure that the fan cowl doors are opened (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)

437AL and 438AR.

(b) FOR [1000EM2] (ENGINE-2)

447AL and 448AR.

(3) Make sure that the access doors are opened:
(a) For the left pylon:

413AL, 413CL, 413EL, 471AL, 471BL and 471CL (Ref. AMM TASK 54-52-11-000-002) (Ref. AMM TASK 54-53-11-000-002).

(b) For the right pylon:

424AR, 424CR, 424ER, 482AR, 482BR and 482CR (Ref. AMM TASK 54-52-11-000-002) (Ref. AMM TASK 54-53-11-000-002).

Subtask 28-16-00-010-058-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that an access platform is in position:

for the left pylon at zone 410
for the right pylon at zone 420.

(2) Make sure that the fan cowl doors are opened (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)

437AL and 438AR.

(b) FOR [1000EM2] (ENGINE-2)

447AL and 448AR.

(3) Make sure that the access doors are opened:
(a) For the left pylon:

413AL, 413CL, 471BL, 471CL and 471DL (Ref. AMM TASK 54-52-11-000-002) (Ref. AMM TASK 54-53-11-000-002).

(b) For the right pylon:

423AR, 423CR, 481BR, 481CR and 481DR (Ref. AMM TASK 54-52-11-000-002) (Ref. AMM TASK 54-53-11-000-002).

Subtask 28-16-00-010-058-C ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:

For the left pylon at zone 410
For the right pylon at zone 420.

(2) Make sure that the access doors are opened:
(a) For the left pylon:

471BL, 451DL, 451EL and 451BL (Ref. AMM TASK 54-51-21-000-802) (Ref. AMM TASK 54-53-11-000-804).

(b) For the right pylon:

481BL, 461DL, 461EL and 425BL (Ref. AMM TASK 54-51-21-000-802) (Ref. AMM TASK 54-53-11-000-804).

(3) Make sure that the thrust reverser cowl-doors opened: (Ref. AMM TASK 78-36-00-010-802)
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)

451AL.

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)

461AL.

4. Procedure
Subtask 28-16-00-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Fuel Recirculation Pipe

Fuel Recirculation Pipe - Location and Detail ** ON A/C NOT FOR ALL

NOTE: This procedure is applicable to the left pylon. Data between parentheses are for the right pylon.

(1) Prepare the pipe assemblies (13) and (5) for the installation as follows:
(a) Clean the external surface of the fuel recirculation pipes and the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Do a visual inspection of the pipe assemblies (13) and (5), they must not be in the blocked condition.
(2) Remove the PLUG-BLANKING from each disconnected line end.
(3) To install the pipe assembly (13), do the steps that follow:
(a) Put the pipe assembly (13) in the position between RIB5 and RIB9.
(b) Install the bushes (31) in the clamps (30).
(c) Install the pipe assembly (13) in the clamps (30).
(d) Install the tube coupling nut (17) on the pipe assembly (13).
(e) TORQUE the coupling nut (17) to between 37 and 30 m.N (27.29 and 22.12 lbf.ft )

.
(f) Use the PIN - LOCKING and install the locking pin (16) on the tube coupling nut (17).
(g) Install the washers (29) and the bolts (28) on the clamps (30).
(h) TORQUE the bolts (28) to between 4.64 and 3.87 m.daN (34.22 and 28.54 lbf.ft )

.
(i) Install the inserts (24) and the cleat-half (25).
(j) Install the angle (19) on the cleat-half (25).
(k) Install the bolts (20) and the nuts (23).
(l) TORQUE the nuts (23) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(m) Install the washer (26) and the bolt (27).
(n) TORQUE the bolt (27) to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )

.
(o) Install the washer (22) and the bolt (21).
(p) TORQUE the bolt (21) to between 3.87 and 3.22 m.daN (28.54 and 23.75 lbf.ft )

.
(q) Install the washers (11) and the bolts (12).
(r) TORQUE the bolts (12) to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )

.
(4) To install the pipe assembly (5), do the steps that follow:
(a) Put the pipe assembly (5) in the position between RIB9 and RIB6.
(b) Connect the pipe assembly (5) to the pipe assembly (13).
(c) Install the bush (31) in the clamp (34).
(d) Install the pipe assembly (5) in the clamp (34).
(e) Apply Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) on the new seal (37).
(f) Install the washer (6) and the bolt (7).
(g) TORQUE the bolt (7) to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )

.
(h) Install the washer (15) and the bolt (14).
(i) TORQUE the bolt (14) to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )

.
(j) Attach the bonding lead (8) to the pipe assembly (5) with the washer (9) and the bolt (10) (Ref. AMM TASK 20-28-00-912-802).
(k) TORQUE the bolt (10) to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )

.
(l) Install the AIPC 28-16-86-01-070 SEAL (37) or AIPC 28-16-06-01-120 SEAL (37), the washers (38), the bolts (39) and the plates (36) to the check valve (35).
(m) TORQUE the bolts (39) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(n) Install the clamp (34) with the washers (33) and the bolts (32) on the pipe assembly (5).
(o) TORQUE the bolts (32) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(p) Attach the clamp (18) to the pipe assembly (5) with the bonding lead (1), washer (3), bolt (2) and nut (4) (Ref. AMM TASK 20-28-00-912-802).
(q) TORQUE the nut (4) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

Subtask 28-16-00-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the pipe assembly

Fuel Recirculation Pipe - Location and Detail ** ON A/C NOT FOR ALL

(1) Preparation for Installation
(a) Clean the external surface of the fuel recirculation pipe and the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Do a visual inspection of the pipe assembly. It must not be blocked.
(2) Remove the PLUG-BLANKING from each disconnected line end.
(3) Do the steps that follow to install the pipe assembly (2):
(a) Put the pipe assembly (2) in position between RIB 1 and 6.
(b) Make sure that the pipe assembly (2) is in correct position and aligned correctly.
(c) Install the washers (12) and the bolts (11).
(d) Retract the shroud and carefully connect the pipe assembly (2) to the union (17) (Ref. AMM TASK 20-21-12-911-001).
(e) TORQUE the clamp (18) to between 0.31 and 0.25 m.daN (27.43 and 22.12 lbf.in )

.
(f) Install the clamps (16) with the bolts (13) and (14) and the washers (15).
(g) Tighten the bolts (11) (Ref. AMM TASK 20-21-11-911-001).
(h) Tighten the bolts (13) and (14) (Ref. AMM TASK 20-21-11-911-001).
(i) Install the bracket (21) with the bolts (19) and (23) and the nuts (20) and (22).
(j) Tighten the nuts (20) and (22) (Ref. AMM TASK 20-21-11-911-001).
(k) Install the ENG1 (ENG2) fan air valve-actuator (Ref. AMM TASK 36-11-54-400-802).
(l) Install the engine fire-extinguisher bottle (Ref. AMM TASK 26-21-41-400-001).
(4) Do the steps that follow to install the pipe assembly (1):
(a) Put the pipe assembly (1) in position between RIB 6 and 7.
(b) Make sure that the pipe assembly (1) is in correct position and aligned correctly.
(c) Apply Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the new seal (5).
(d) Install the bolts (3), the washers (4), the AIPC 28-16-86-01-070 SEAL (5) and the plates (6) to the check valve (7).
(e) Connect the pipe assembly (1) to the pipe assembly (2) (Ref. AMM TASK 20-21-12-911-001).
(f) Attach the bonding leads (8) to the pipe assembly (1) with the bolts (10) and the washers (9) (Ref. AMM TASK 20-28-00-912-802).
(g) Tighten the bolts (3) (Ref. AMM TASK 20-21-11-911-001).

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.

(h) Safety the bolts (3) and (10) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

Subtask 28-16-00-865-061-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 28-16-00-410-057-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) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)

437AL and 438AR.

(b) FOR [1000EM2] (ENGINE-2)

447AL and 448AR.

(3) Close the access doors:
(a) For the left pylon:

413AL, 413CL, 413EL, 471AL, 471BL and 471CL (Ref. AMM TASK 54-52-11-400-002) (Ref. AMM TASK 54-53-11-400-002).

(b) For the right pylon:

424AR, 424CR, 424ER, 482AR, 482BR and 482CR (Ref. AMM TASK 54-52-11-400-002) (Ref. AMM TASK 54-53-11-400-002).

Subtask 28-16-00-410-057-B ** 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) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)

437AL and 438AR.

(b) FOR [1000EM2] (ENGINE-2)

447AL and 448AR.

(3) Close the access doors:
(a) For the left pylon:

413AL, 413CL, 471BL, 471CL and 471DL (Ref. AMM TASK 54-52-11-400-002) (Ref. AMM TASK 54-53-11-400-002).

(b) For the right pylon:

423AR, 423CR, 481BR, 481CR and 481DR (Ref. AMM TASK 54-52-11-400-002) (Ref. AMM TASK 54-53-11-400-002).

Subtask 28-16-00-410-057-C ** 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) Close the thrust reverser cowl-doors: (Ref. AMM TASK 78-36-00-410-802)
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)

451AL.

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)

461AL.

(3) Close the access doors:
(a) For the left pylon:

471BL, 415AR, 415AL, 451DL, 451EL and 415BL (Ref. AMM TASK 54-51-21-400-802) (Ref. AMM TASK 54-53-11-400-804).

(b) For the right pylon:

481BL, 425AR, 425AL, 461DL, 461EL and 425BL (Ref. AMM TASK 54-51-21-400-802) (Ref. AMM TASK 54-53-11-400-804).

Subtask 28-16-00-710-051-A ** ON A/C NOT FOR ALL

D. Test
(1) Do a leak check of the applicable check valve (Ref. AMM TASK 73-11-50-360-002). No leaks are permitted.

Subtask 28-16-00-710-051-B ** ON A/C NOT FOR ALL

D. Test
(1) Do a leak check of the applicable check valve (Ref. AMM TASK 73-11-50-360-001). No leaks are permitted.

Subtask 28-16-00-710-051-C ** ON A/C NOT FOR ALL

D. Test
(1) Do a leak check of the applicable check valve (Ref. AMM TASK 28-16-00-790-001). No leaks are permitted.

Subtask 28-16-00-710-051-E ** ON A/C NOT FOR ALL

D. Leak Test
(1) Do a leak test of the pylon fuel return-pipe and the check valves (Ref. AMM TASK 71-00-00-720-811). No leaks are permitted.

Subtask 28-16-00-710-051-I ** ON A/C NOT FOR ALL

D. Leak Test
(1) Do a leak check of the applicable check valve (Ref. AMM TASK 28-16-00-790-002):
(a) Make sure that there are no leaks.

Subtask 28-16-00-650-054-A

E. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).

5. Close-up
Subtask 28-16-00-942-056-A

A. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 06:43:25 UTC