Installation of the Thrust Reverser Hinge Access Panels [CFML]

TASK 78-36-45-400-801-A
Installation of the Thrust Reverser Hinge Access Panels

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 39.82 and 30.98 lbf.in (0.45 and 0.35 m.daN )

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
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
Thrust Reverser Hinge Access Panels

3. Job Set-up
Subtask 78-36-45-941-051-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) are 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 78-36-45-010-052-A

B. 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 ACCESS PLATFORM 2M (6 FT) is in position.

Subtask 78-36-45-040-051-A

C. Deactivation of the Thrust Reverser System for Nacelle 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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 78-36-45-010-053-A

D. Get Access
(1) 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

4. Procedure
Subtask 78-36-45-420-050-A

CAUTION: MAKE SURE THAT THE FREE ENDS OF THE HINGE ACCESS PANELS ARE INSTALLED BELOW THE PYLON FORWARD FAIRING. IF THEY ARE NOT, DAMAGE TO THE HINGE ACCESS PANELS AND/OR THE PYLON FORWARD FAIRING CAN OCCUR.

CAUTION: INSTALL THE REAR HINGE ACCESS-PANEL FIRST AND THEN INSTALL THE FRONT HINGE ACCESS-PANEL. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE HINGE ACCESS PANELS CAN OCCUR.

A. Installation of the Thrust Reverser Hinge Access Panels

NOTE: This procedure is given for the left hinge access panels. It is also applicable to the right hinge access panels.

(1) Put in position the rear hinge access panel (3).
(2) Install the screws (1).
(3) TORQUE the screws (1) to between 39.82 and 30.98 lbf.in (0.45 and 0.35 m.daN )

.
(4) Put in position the front hinge access panel (2).
(5) Install the screws (1).
(6) TORQUE the screws (1) to between 39.82 and 30.98 lbf.in (0.45 and 0.35 m.daN )

5. Close-up
Subtask 78-36-45-410-050-A

A. 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 78-36-00-410-806)
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 78-36-45-440-050-A

B. Do the reactivation of the Thrust Reverser after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-36-45-410-051-A

C. Close Access
(1) 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
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 12:50:02 UTC