Installation of the Thrust Reverser Cascades [CFML]

TASK 78-32-43-400-806-A
Installation of the Thrust Reverser Cascades

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.

ZONE: 400

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
No specific	1	VIBRO ENGRAVER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 43.8 and 35.8 lbf.in (0.49 and 0.40 m.daN )
No specific	Torque wrench: range to between 112.40 and 92.05 lbf.in (1.27 and 1.04 m.daN )
98N7830H004-000	1	AFT FRAME RETAINER KIT

B. Consumable Materials

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

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
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 78-32-50-010-801-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 Cascades
Cascade Configuration ID Plate

3. Job Set-up
Subtask 78-32-43-941-064-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 78-32-43-010-077-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

Subtask 78-32-43-040-065-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 the thrust reverser system is deactivated for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 78-32-43-010-081-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 ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the fan cowl if you removed an upper cascade (cascades No.1 thru No.5).
For the cascade number, refer to

Thrust Reverser Cascades

(3) Make sure that the hinge access panel and the slat clearance panel are removed (Ref. AMM TASK 78-36-45-000-801) (Ref. AMM TASK 78-32-15-000-801)

NOTE: Hinge access panel and slat clearance panel only have to be removed for access on cascade No. 1 or No.2 located on the applicable side of the engine.

(4) Make sure that the slat clearance panel is removed (Ref. AMM TASK 78-32-15-000-801).

4. Procedure
Subtask 78-32-43-420-074-A

CAUTION: MAKE SURE THAT YOU INSTALL THE CASCADES IN THE CORRECT POSITION. TO DO THAT, REFER TO THE LOCATION AND PART NUMBER SHOWN ON THE ”CASCADE TYPE SPECIFIER” PLATE ON THE FORWARD FRAME AT 6 O’CLOCK. INCORRECT POSITION OF THE CASCADES CAN CAUSE UNSATISFACTORY OPERATION OF THE THRUST REVERSER.

A. Installation of the Thrust Reverser Cascades

NOTE: The cascade configuration is different on Engine 1 and Engine 2. Refer to AIPC section 78-32-80 for each engine configuration.

(1) If the 98N7830H004-000 AFT FRAME RETAINER KIT is installed, remove it. Refer to the manufacturer's instructions.
(2) Lubricate the threads of the bolts (2) and the bolts (4) with the LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(3) Install the cascade (3) as follows:
(a) Put the cascade (3) in position on the thrust reverser as follows:
1 Put the aft edge of the cascade (3) inboard of the aft frame (7).
2 Move the forward edge of the cascade (3) inboard until it touches the forward frame (6).
3 Align the bolt holes in the cascade (3) with the nut plates in the thrust reverser.
(b) Install the four bolts (4) and the washers (5) to attach the cascade (3) to the forward frame (6). Start with bolt hole No. 8 and continue in sequence to bolt hole Number (No.) 5.

NOTE: It is important to install the forward bolts before the aft bolts.

(c) Install the four bolts (2) and the washers (1) to attach the cascade (3) to the aft frame (7). Start with bolt hole No. 4 and continue in sequence to bolt hole No. 1.
(d) TORQUE the four forward bolts (4) to between 112.40 and 92.05 lbf.in (1.27 and 1.04 m.daN )

.
(e) TORQUE the four aft bolts (2) to between 43.8 and 35.8 lbf.in (0.49 and 0.40 m.daN )

.
(4) Examine the cascade configuration ID plate (8).

NOTE: If the cascades are not installed on the same engine position, you should change the cascades configuration.

(a) Examine the last ”Current Configuration Engine” active on the cascade configuration ID plate (8).

NOTE: The last configuration is indicated by the non-crossed number engraved: 1 for Engine position 1 or 2 for Engine position 2.

(b) If the number engraved is in accordance with the engine cascade installation, leave as is.
(c) If the cascades are not installed on the same engine position, put a cross mark on the current active number and engrave the nacelle position (position 1 or position 2) with a VIBRO ENGRAVER in the first available box of the cascade configuration ID plate (8).

NOTE: The two cascade configuration ID plates (8) (one for the left thrust reverser cowl door and one for the right thrust reverser cowl door) must have the last same engraved nacelle position for a same engine.

NOTE: Engrave the nacelle position in the box starting from top to bottom then from left to right.

5. Close-up
Subtask 78-32-43-410-064-A

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

Subtask 78-32-43-440-057-A

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

Subtask 78-32-43-410-063-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).

Subtask 78-32-43-740-050-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 13:13:24 UTC