Installation of the Tie Rods of the Pylon Fuel-Hydraulic Panel

TASK 29-15-61-400-801-A
Installation of the Tie Rods of the Pylon Fuel-Hydraulic Panel

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.

ZONE: 413
ZONE: 423

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 2M (6 FT) - ADJUSTABLE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QDC1)	Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
413	UPPER FWD PYLON
423	UPPER FWD PYLON
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 29-15-61-000-801-A	Removal of the Tie Rods of the Pylon Fuel-Hydraulic Panel
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
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
Tie Rods of the Pylon Fuel-Hydraulic Panel

3. Job Set-up
Subtask 29-15-61-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-15-61-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 29-15-61-040-051-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 29-15-61-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the hydraulic/fuel pylon interface.

4. Procedure
Subtask 29-15-61-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Tie Rods of the Pylon Fuel-Hydraulic Panel

NOTE: If you install a new lower or upper tie rod, the new tie rod is pre-adjusted to a given length. This length is related to the part number of the tie rod.

(1) Installation of the upper tie rod:
(a) Install the rod ends of the upper tie rod (6) on the pylon fitting and on the fitting of the fuel hydraulic panel (7).
(b) Install the washers (4) and the bolts (5).
(c) Install the bushes (3), washers (2) and nuts (1).
(d) Tighten the nuts (1).
(2) Installation of the lower tie rod:
(a) Install the rod ends of the lower tie rod (13) on the pylon fitting and on the fitting of the fuel hydraulic panel (7).
(b) Install the washers (11) and the bolts (12).
(c) Install the bushes (10), washers (9) and nuts (8).
(d) Tighten the nuts (8).
(3) Manually turn the body of the tie rods (6) and (13) to make sure that there is no tension on the tie rods.
(a) If you can turn the body of the rod, it is not necessary to adjust the tie rods. Go to Para. 5.
(b) If you cannot turn the body of a tie rod:
1 Release the tension on the applicable tie rod:

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.

a Cut, remove and discard the lockwire (14).
b Loosen the nuts (15).
c Turn the body of the applicable tie rod to release the tension on the rod.
d Tighten the nuts (15).
e Remove the applicable tie rod (Ref. AMM TASK 29-15-61-000-801).

NOTE: It is necessary to remove the tie rod because the installation of lockwire on the nuts (15) is not possible when the tie rod is connected.

f Safety the nuts (15) with the 14QDC1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES - (14).
g Do Steps 4.A.(1) or 4.A.(2) thru 4.A.(3) again.

5. Close-up
Subtask 29-15-61-410-050-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) Remove the access platform(s).
(3) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 29-15-61-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 29-15-61-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

[Rev.10 from 2021] 2026.04.01 07:54:53 UTC