Installation of the Thrust Reverser Blocker Doors [CFML]

TASK 78-32-42-400-804-A
Installation of the Thrust Reverser Blocker Doors

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.

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

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 72 and 68 lbf.in (0.81 and 0.77 m.daN )
No specific	Torque wrench: range to between 227 and 213 lbf.in (2.57 and 2.41 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE

C. Work Zones and Access Panels

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

D. 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 73-29-00-740-804-A	Thrust Reverser Cycling Test (Menu Mode)
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 78-32-15-000-801-A	Removal of the Slat Panel
TASK 78-32-15-400-801-A	Installation of the Slat Panel
TASK 78-32-43-000-806-A	Removal of the Thrust Reverser Cascades
TASK 78-32-43-400-806-A	Installation of the Thrust Reverser Cascades
TASK 78-32-47-400-802-A	Installation of the Link Arm Fitting Fairing
TASK 78-32-50-010-801-A	Manually Deploy the Translating Cowl
TASK 78-32-50-410-801-A	Manually Stow the Translating Cowl
TASK 78-36-45-000-801-A	Removal of the Thrust Reverser Hinge Access Panels
TASK 78-36-45-400-801-A	Installation of the Thrust Reverser Hinge Access Panels
Thrust Reverser Blocker Doors
Upper Thrust Reverser Blocker Door

3. Job Set-up
Subtask 78-32-42-941-066-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 78-32-42-010-084-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 78-32-42-040-071-A

C. Deactivation of the Thrust Reverser System for Ground 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 78-30-00-040-807).

Subtask 78-32-42-010-088-A

D. Get Access
(1) Make sure that the translating cowl is deployed (Ref. AMM TASK 78-32-50-010-801).
(2) Make sure that the two adjacent thrust reverser cascades are removed to get access to the blocker door that you will remove (Ref. AMM TASK 78-32-43-000-806).
(3) If you will install the upper blocker door, make sure that the panels that follow are removed :

NOTE: Removal of these panels is only necessary for the installation of the upper blocker door.

(a) Make sure that the hinge access panel is removed (Ref. AMM TASK 78-36-45-000-801).
(b) Make sure that the slat panel is removed (Ref. AMM TASK 78-32-15-000-801).

4. Procedure
Subtask 78-32-42-420-066-A

A. Installation of the Blocker Door Link Arm

CAUTION: MAKE SURE THAT YOU INSTALL THE HEAD OF THE BOLT ON THE UPPER SIDE OF THE DOOR. INCORRECT INSTALLATION OF THE BOLT CAN CAUSE DAMAGE TO THE EQUIPMENT.

(1) Install the link arm (2) with the bushing (26), bushing (29), bolt (24), washer (25), washer (27) and nut (28).

NOTE: Do not wet-install.

(2) TORQUE the nut (28) to between 227 and 213 lbf.in (2.57 and 2.41 m.daN )

Subtask 78-32-42-420-063-A

B. Installation of the Thrust Reverser Blocker Door

CAUTION: MAKE SURE THAT THE FREE END OF THE LINK ARM AND THE BLOCKER DOOR DOES NOT FALL. IF IT FALLS, THIS CAN CAUSE DAMAGE TO THE BLOCKER DOOR OR ADJACENT COMPONENTS.

(1) Lubricate the threads of the bolts (8), (16) and (18) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(2) You can apply protective material to the blocker door (9) and link arm (2) to help prevent unwanted movement and damage.
(3) Carefully move the blocker door (9) to the correct position in the thrust reverser:
(a) Align the holes in the hinges (10) and (17) with the mating holes in the blocker door.

NOTE: It is recommended that one person hold the blocker door while a second person installs the fasteners.

(4) Examine the report made during the removal procedure to identify the location of the floating hinge.
(5) Install the spacer (11), spacer (15), washer (14), bolt (16), washer (12) and nut (13) to attach the blocker door (9) to the floating hinge (10).
(6) Examine the report made during the removal procedure to identify the location of the fixed hinge.
(7) Install the spacer (20), washer (19), bolt (18), washer (23), the three washers (22) and nut (21) to attach the blocker door (9) to the fixed hinge (17).
(8) TORQUE the bolts (16) and (18) to between 72 and 68 lbf.in (0.81 and 0.77 m.daN )

.
(9) Remove the protective material from the blocker door (9) and the link arm (2).
(10) Install the spacer (7), washer (1), bolt (8), washer (5), nut (4) and cotter pin (3) to attach the link arm (2) to the fixed structure fitting (6) (Ref. AMM TASK 78-32-47-400-802).

5. Close-up
Subtask 78-32-42-410-076-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the thrust reverser cascades (Ref. AMM TASK 78-32-43-400-806).
(3) If you removed the slat panel, install it (Ref. AMM TASK 78-32-15-400-801).
(4) If you removed the hinge access panel, install it (Ref. AMM TASK 78-36-45-400-801).
(5) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).

Subtask 78-32-42-440-063-A

B. Do the reactivation of the thrust reverser after maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-32-42-410-074-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 access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 78-32-42-700-050-A

D. Test
(1) Do the operational test of the thrust reverser system (Ref. AMM TASK 73-29-00-740-804).

[Rev.10 from 2021] 2026.04.01 03:36:05 UTC