Installation of the Forward Crossover Beam (Inboard Fan and T/R Cowls not Removed) [IAE]

TASK 78-30-10-400-010-A-01
Installation of the Forward Crossover Beam (Inboard Fan and T/R Cowls not Removed)

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 2M (6 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 190 and 160 lbf.in (2.15 and 1.81 m.daN )
No specific	Torque wrench: range to between 690 and 480 lbf.in (7.80 and 5.42 m.daN )
No specific	Torque wrench: range to between 0.8 and 0.7 m.daN (70.80 and 61.95 lbf.in )
IAE1N20002	1	SLING-FAN THRUST REVERSER
S889BH0	1	BRACE - HOLD OPEN COWLS
TMHBS13-00-00	1	BRACE-HOLD OPEN COWLS

B. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	COTTER PIN	AIPC 54-57-17-02-260

C. Referenced Information

REFERENCE	DESIGNATION
TASK 54-56-00-400-002-A	Installation of the Lower Fairing
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-00-20-400-040-A	Installation of the Power Plant
TASK 71-00-20-400-040-A-01	Installation of the Power Plant with the Engine Positioner TWW 75E (MIAG)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-11-400-010-A	Installation of the Left Fan Cowl
TASK 71-13-16-400-010-B	Installation of the Right Fan Cowl (438AR, 448AR)
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
TASK 78-32-01-400-010-A	Installation of the Left Thrust Reverser Half - Eng No. 1
TASK 78-32-04-400-010-A	Installation of the Right Reverser Half - Eng. No. 2
Forward Crossover Beam
Outboard Thrust Reverser Half Hinges for ENG 1
Outboard Thrust Reverser Half Hinges for ENG 2
Outboard Thrust Reverser Half for ENG 1
Outboard Thrust Reverser Half for ENG 2

3. Job Set-up
Subtask 78-30-10-860-053-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position.

4. Procedure
Subtask 78-30-10-420-058-A ** ON A/C NOT FOR ALL

A. Install the forward crossover beam.

Forward Crossover Beam ** ON A/C NOT FOR ALL

(1) Install the spacer (5), the bolt (4), the washer (3) and the nut (2).
(2) TORQUE the nut (2) to between 0.8 and 0.7 m.daN (70.80 and 61.95 lbf.in )

.
(3) Install the AIPC 54-57-17-02-260 COTTER PIN (1).

Subtask 78-30-10-420-059-B ** ON A/C NOT FOR ALL

B. Install the parts removed for access to the Crossover Beam.
(1) Configuration 1 : Outboard T/R half not removed.

Outboard Thrust Reverser Half Hinges for ENG 1 ** ON A/C NOT FOR ALL

Outboard Thrust Reverser Half Hinges for ENG 2 ** ON A/C NOT FOR ALL

(a) At the position No.1 of the T/R half hinge:
1 Install the bolt (1) and the washer (11).
2 Install the nut (10) to the bolt (1). Do not tighten the nut at this step.
(b) At the position No.4 of the T/R half hinge:
1 TORQUE the nut (6) to between 690 and 480 lbf.in (7.80 and 5.42 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(c) At the positions No.2 and No.3 of the T/R half hinge:
1 TORQUE the nuts (8) to between 190 and 160 lbf.in (2.15 and 1.81 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(d) At the position No.1 of the T/R half hinge:
1 TORQUE the nut (10) to between 190 and 160 lbf.in (2.15 and 1.81 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(2) Configuration 2 : Outboard T/R half removed.

For ENG 1 (Ref. AMM TASK 78-32-01-400-010)
For ENG 2 (Ref. AMM TASK 78-32-04-400-010)

Subtask 78-30-10-420-060-B ** ON A/C NOT FOR ALL

C. Install the Outboard Fan Cowl (Ref. AMM TASK 71-13-11-400-010) or (Ref. AMM TASK 71-13-16-400-010).

Subtask 78-30-10-420-061-A ** ON A/C NOT FOR ALL

D. Install the Brace of the Outboard Fan Cowl and Thrust Reverser Halves.
(1) Install the S889BH0 BRACE - HOLD OPEN COWLS or TMHBS13-00-00 BRACE-HOLD OPEN COWLS to support the fan and thrust reverser cowl doors.
(2) Put the adjustable struts in position.
(3) Adjust the length of the struts so that they hold the weight of the thrust reverser halves.
(4) Put the thrust reverser half-open rods in their storage positions (Ref. AMM TASK 78-32-00-410-010).
(5) Install the support arms so that they hold the weight of the fan cowl doors.

NOTE: The support arms must be installed so that the brackets are on the second latch from the front of the thrust reverser halves.

(6) Put the fan cowl hold-open rods in their storage positions (Ref. AMM TASK 71-13-00-410-010).

Subtask 78-30-10-080-050-A ** ON A/C NOT FOR ALL

E. Remove the thrust reverser sling and the slat protection mat
-For ENG 1

Outboard Thrust Reverser Half for ENG 1 ** ON A/C NOT FOR ALL

-For ENG 2

Outboard Thrust Reverser Half for ENG 2 ** ON A/C NOT FOR ALL

(1) Remove the IAE1N20002 SLING-FAN THRUST REVERSER (1) from the thrust reverser half (3).
(2) install the threaded fasteners in the hoist point nut plates.
(3) Remove the slat protection mats from the slats.
(4) Position the hinge access panel (2) on the thrust reverser half.
(5) Attach the hinge access panel with the 11 screws (4).
(6) Install the thrust reverser pylon fairing (Ref. AMM TASK 54-56-00-400-002).

Subtask 78-30-10-420-062-A ** ON A/C NOT FOR ALL

F. Install the engine (Ref. AMM TASK 71-00-20-400-040).

5. Close-up
Subtask 78-30-10-410-054-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 WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 03:27:22 UTC