Installation of the Apron Assemblies

TASK 54-57-22-400-001-A
Installation of the Apron Assemblies

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

ZONE: 410
ZONE: 420
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 3M (10 FT)- ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
415AL, 415AR, 415BL, 415BR, 425AL, 425AR, 425BL, 425BR
FOR [1000EM1] (ENGINE-1)
451AL, 452AR
FOR [1000EM2] (ENGINE-2)
461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 54-51-21-000-001-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-001-A	Installation of the Pylon Lateral Access-Doors
TASK 54-57-22-400-003-A	Installation of the Sections
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for 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
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Apron Assembly ** ON A/C NOT FOR ALL
Seal and Retainer Assembly ** ON A/C NOT FOR ALL
Forward Apron Assembly ** ON A/C NOT FOR ALL
Welded Assembly ** ON A/C NOT FOR ALL
Angle Assembly ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 54-57-22-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that a WARNING NOTICE(S) is in position in the cockpit to tell persons not to start engine 1(2).
(2) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 54-57-22-040-091-A ** ON A/C NOT FOR ALL

B. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041).

Subtask 54-57-22-010-089-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
(2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.

Subtask 54-57-22-040-091-B ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-012).

Subtask 54-57-22-010-089-B ** ON A/C NOT FOR ALL

E. Get Access
(1) 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.
(2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
(3) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-001):
(a) For the left pylon: 415AL 415BL 415AR 415BR
(b) For the right pylon: 425AL 425BL 425AR 425BR.

Subtask 54-57-22-110-064-A ** ON A/C NOT FOR ALL

F. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) If they are not sufficiently clean, clean the parts retained from the removed component with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Do an inspection of the component interfaces and the adjacent area.

4. Procedure
Subtask 54-57-22-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Apron Assemblies on the Left Pylon

Apron Assembly ** ON A/C NOT FOR ALL

(1) Install the aft aprons (51) and (63).
(a) Position the forward aprons (57) and (59).
(b) Position the aft aprons (51) and (63).
(c) Install the washers (52) and the bolts (53).
(d) Tighten the bolts (53).
(e) Install the washers (62) and the bolts (61).
(f) Tighten the bolts (61).
(g) Position the brackets (56) and (60) on the forward aprons (57) and (59).
(h) Install the screws (58).
(i) Install the washers (55) and the bolts (54).
(j) Tighten the bolts (54).
(2) Installation of the seal and retainer assemblies (41) and (44).

Seal and Retainer Assembly ** ON A/C NOT FOR ALL

(a) Position the seal and retainer assemblies (41) and (44) on the pylon structure.
(b) Install the washers (42),(46) and the bolts (43),(45).
(c) Tighten the bolts (43),(45).

NOTE: Do the same procedure for the installation of the right pylon.

Subtask 54-57-22-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Apron Assemblies
(1) Install the forward apron assemblies (21) and (32) in position on the pylon. To do this:

Forward Apron Assembly ** ON A/C NOT FOR ALL

(a) Put the forward apron assemblies (21) and (32) in position on the pylon structure.
(b) Install the washers (30) and the bolts (29).
(c) Install the washers (22) and the bolts (23).
(d) Tighten the bolts (23) and (29).
(e) Install the washers (25) and the bolts (26).
(f) Tighten the bolts (26).
(g) Put the front angle assemblies (24) and (31) in position on the forward apron assemblies (21) and (32).
(h) Install the washers (28) and the bolts (27).
(i) Tighten the bolts (27).
(2) Install the welded assemblies in position on the pylon. To do this:

Welded Assembly ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT YOU INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION. THE SCREWS HAVE DIFFERENT LENGTHS. IF YOU DO NOT INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION, YOU CAN CAUSE DAMAGE.

(a) Put and hold the aft angle (38) in position on the pylon between RIB1 and RIB5.
(b) Install the washer (56), the screw (55) and the nut (17).
(c) Install the washer (54), the bolt (53) and the nut (18).
(d) Install the washer (52), the bolt (51) and the nut (19).
(e) Install the washer (48), the bolt (47) and the nut (34).
(f) Install the washer (46), the bolt (45) and the nut (35).
(g) Install the washers (44), the bolts (43) and the nuts (33).
(h) Install the washers (40), the screws (39) and the nuts (37).
(i) Install the washers (50), the screws (49) and the nuts (20).
(j) Install the washers (42), the screws (41) and the nuts (36).
(k) Tighten the nuts (17), (18), (19), (20), (33), (34), (35), (36) and (37).
(l) Put and hold the forward angle (14) in position on the pylon between RIB06 and RIB1.
(m) Install the washers (16) and the screws (15).
(n) Install the washers (11) and the screws (10).
(o) Install the washers (13) and the screws (12).
(p) Tighten the screws (10), (12) and (15).
(q) Install the washer (8), the screw (9) and the nut (7).
(r) Tighten the nut (7).
(s) Install the profiles (Ref. AMM TASK 54-57-22-400-003).
(3) Install the angle assemblies (1) and (4) in position on the pylon. To do this:

Angle Assembly ** ON A/C NOT FOR ALL

(a) Put the angle assemblies (1) and (4) in position on the pylon.
(b) Install the washers (2) and the bolts (3).
(c) Install the washer (5) and the bolt (6).
(d) Tighten the bolts (3) and (6).

5. Close-up
Subtask 54-57-22-410-050-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 doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 54-57-22-440-073-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-081-041).

Subtask 54-57-22-410-050-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) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-001):
(a) For the left pylon: 415AL 415BL 415AR 415BR
(b) For the right pylon: 425AL 425BL 425AR 425BR.
(3) Close the thrust reverser doors (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 54-57-22-440-073-B ** ON A/C NOT FOR ALL

D. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-012).

Subtask 54-57-22-942-050-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 06:42:55 UTC