Installation of the Forward Centering Pins of the Pyramid Assembly

TASK 54-51-43-400-803-A
Installation of the Forward Centering Pins of the Pyramid Assembly

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.

CAUTION: BEFORE YOU INSTALL/REMOVE THE GSE-TOOL, READ THE INSTRUCTIONS IN THE APPLICABLE GSE INSTRUCTION MANUAL. WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT OBEY THE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.

ZONE: 410
ZONE: 420
FIN: 4020KM1
FIN: 4020KM2

1. Reason for the Job

NOTE: Two persons are necessary to do this task.

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 9.6 and 8.4 m.daN (70.80 and 61.95 lbf.ft )
98D54503004000	1	ALIGN CENTRING PINS CFM

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
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-51-400-803-A	Installation of the Power Plant with 2D Bootstrap
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Forward Centering Pins of the Pyramid Assembly
Alignment of the Forward Centering Pins of the Pyramid Assembly

3. Job Set-up
Subtask 54-51-43-941-055-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the ENG/ MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 54-51-43-040-055-A

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 sure that the thrust reverser is unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 54-51-43-010-054-A

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Make sure that the thrust-reverser cowl doors are open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.

Subtask 54-51-43-110-052-A

D. 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 54-51-43-420-052-A

A. Installation of the Forward Centering Pins of the Pyramid Assembly

Forward Centering Pins of the Pyramid Assembly

Alignment of the Forward Centering Pins of the Pyramid Assembly

NOTE: Two person are necessary to install the forward centering pins:

One to hold the wrench head
Another one to hold the wrench handle and apply the torque.

(1) Make sure that the forward centering pins (3) are in the correct condition. If one of the centering pins (3) is not in the correct condition discard it and install a new centering pin (3).
(2) Put the forward centering pins (3) in position.
(3) Install the washers (2) and the new nuts (1).
(4) Make sure that the forward centering pins (3) are aligned. To do this, put the 98D54503004000 ALIGN CENTRING PINS CFM (4) and (5) into the holes of the forward centering pins (3) (in the correct direction).
(5) TORQUE the nuts (1) to between 9.6 and 8.4 m.daN (70.80 and 61.95 lbf.ft )

.
(6) Remove the 98D54503004000 ALIGN CENTRING PINS CFM (4) and (5) from the forward centering pins (3).

5. Close-up
Subtask 54-51-43-410-052-A

A. Close Access
(1) Install the power plant (Ref. AMM TASK 71-00-51-400-803).
(2) Close the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
(3) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.

Subtask 54-51-43-440-052-A

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 54-51-43-942-052-A

C. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:01:27 UTC