Installation of the C-Duct Locking Actuator [IAE]

TASK 78-32-43-400-010-A
Installation of the C-Duct Locking Actuator

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This TASK supplies the data to install the left and right C-duct locking actuators.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 35 and 30 lbf.in (0.40 and 0.34 m.daN )
No specific	Torque wrench: range to between 80 and 60 lbf.in (0.90 and 0.68 m.daN )
No specific	Torque wrench: range to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )
No specific	Torque wrench: range to between 240 and 210 lbf.in (2.71 and 2.37 m.daN )
No specific	Torque wrench: range to between 936 and 852 lbf.in (10.58 and 9.63 m.daN )
IAE1N20049	2	PIN - LOCKOUT ACTUATOR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06BHG1)	Silicone Sealant-Firewall High Temp. -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451CL, 452CR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461CL, 462CR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-15-912-010-A	Connection of Electrical Connectors
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-30-00-820-010-A	Rigging of the Thrust Reverser System
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-32-00-860-011-A	Manual Retraction of the Thrust Reverser Translating Sleeves
TASK 78-32-19-400-010-A	Installation of the Thrust Reverser Deflector Boxes
TASK 78-32-41-400-010-A	Installation of the Left Thrust Reverser Manual Drive Mechanism
TASK 78-32-44-400-010-A	Installation of the Left C-Duct Flexible Synchronous Cables and Tubes
Actuator Access Panel Locations
Forward and Aft Supports and Rod-end Connection
Forward and Aft Supports and Rod-End Connection
Left C-Duct Locking Actuator
Right C-Duct Locking Actuator

3. Job Set-up
Subtask 78-32-43-860-050-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) - ADJUSTABLE is in position.

Subtask 78-32-43-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the actuator access panels are removed

Actuator Access Panel Locations ** ON A/C NOT FOR ALL

(a) FOR [1000EM1] (ENGINE-1)
451CL 452CR
(b) FOR [1000EM2] (ENGINE-2)
461CL 462CR.

Subtask 78-32-43-040-051-A ** ON A/C NOT FOR ALL

C. Thrust Reverser Deactivation

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-43-611-050-A ** ON A/C NOT FOR ALL

D. Make sure that the actuator is full of system hydraulic fluid.

4. Procedure
Subtask 78-32-43-420-050-D ** ON A/C NOT FOR ALL

A. Installation of the Locking Actuator
(1) Install the actuator

Forward and Aft Supports and Rod-end Connection ** ON A/C NOT FOR ALL

Forward and Aft Supports and Rod-End Connection ** ON A/C NOT FOR ALL

SBN 78-0199
(a) Install the seal (26) over the end of the actuator (4).
Put the seal against the plate at the base of the actuator gimbal (25).
(b) Align the rod end mount hole so that it is parallel with the actuator pin mount holes in the actuator. Keep the rod end in this position during the remaining installation procedure.
(c) Manually move the actuator to the fully closed (stowed) position (Ref. AMM TASK 78-32-00-860-011).
(d) Install the actuator in the C-duct. Put it carefully through the structure and keep the correct rod end position.
(2) Connect the locking actuator to the forward and aft supports

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

(a) Install the two actuator pins.

Forward and Aft Supports and Rod-End Connection ** ON A/C NOT FOR ALL

1 Push the actuator to the rear to compress the seal (26). Install the two actuator pins (28) that attach the actuator to the forward support (29).
2 Install the two retainer pins(27) in the forward support.
3 Mix the Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) . Refer to manufacturer's instructions.
4 Apply Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) to retainer pin (27) and retainer pin holes. Do not apply to threaded area.
5 Let the sealant cure.

NOTE: Fully cured silicone sealant may not be necessary under repair conditions. The uncured sealant is structurally and functionally acceptable.

6 Install the loose cushion half (24) on the actuator. Be careful to keep the correct rod position.
7 Align the marks on the cushion halves.
8 Install the clamp half (35) with the two bolts (32) and (39), four washers (33) and (38) and two nuts (36) and (37).
9 TORQUE the nut (36) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
10 TORQUE the nut (37) to between 35 and 30 lbf.in (0.40 and 0.34 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(3) Install the manual drive mechanism (Ref. AMM TASK 78-32-41-400-010).
(4) Attach the actuator rod end to the translating sleeve bracket

Forward and Aft Supports and Rod-end Connection ** ON A/C NOT FOR ALL

Forward and Aft Supports and Rod-End Connection ** ON A/C NOT FOR ALL

CAUTION: YOU CANNOT CORRECTLY RIG THE THRUST REVERSER IF YOU DO NOT KEEP THE ROD END FROM TURNING WHILE YOU EXTEND THE ACTUATOR.

(a) Hold the rod end so it aligns with (will fit into) the translating sleeve bracket.
(b) Use the manual drive to extend the actuator until the rod end fits into the translating sleeve bracket and you can install the bushing (20) and bolt (19). Do not torque the bolt now.

NOTE: If the blank cascade was removed, refer to the installation instructions (Ref. AMM TASK 78-32-19-400-010).

Subtask 78-32-43-941-052-A ** ON A/C NOT FOR ALL

B. Put a CONTAINER 5 L (1.32 USGAL) below the hydraulic connections.

Subtask 78-32-43-420-051-A ** ON A/C NOT FOR ALL

C. Installation of the Tubes

Left C-Duct Locking Actuator ** ON A/C NOT FOR ALL

Right C-Duct Locking Actuator ** ON A/C NOT FOR ALL

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. ANY UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND SOME PARTS.

(1) Remove the caps from the tubes and the actuator.
(2) Install the lower flexshaft/tube (2).

CAUTION: BEFORE INSTALLING THE FLEXSHAFT/TUBE (2), MAKE SURE THE TRIANGULAR-FLANGED-ADAPTER IS ATTACHED TO THE ACTUATOR WITH THREE BOLTS AND LOCKWIRE. IF THERE ARE ANY SIGNS THAT THE TRIANGULAR-FLANGED-ADAPTER OR LOCKWIRE HAS BEEN REMOVED OR TAMPERED WITH, THE ACTUATOR SHOULD BE REPLACED BECAUSE DAMAGE COULD OCCUR TO THE ACTUATOR.

(a) Pull the telescoping end fitting of the lower flexshaft/tube (2) up and put the flexshaft (10) into the actuator socket.
(b) Pull the telescoping end fitting down and engage the locknut (8).
(c) Attach the tube nut (9) to the actuator (4).
(d) TORQUE the tube nut to between 936 and 852 lbf.in (10.58 and 9.63 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

NOTE: Hold the flats on the end of the lower flexshaft/tube when you torque the tube nut.

(3) Install the lower hydraulic tube (1).
(a) Connect the tube nut of the lower hydraulic tube (1) to the actuator (4).
(b) TORQUE the tube nut to between 240 and 210 lbf.in (2.71 and 2.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

NOTE: Hold the flats on the end of the lower hydraulic tube when you torque the tube nut.

(c) Install the tube clamps (removed during the removal task) on the lower hydraulic tube (1) (Ref. AMM TASK 78-32-44-400-010).

Subtask 78-32-43-942-050-A ** ON A/C NOT FOR ALL

D. Remove the container and discard the drained hydraulic fluid.

Subtask 78-32-43-630-051-A ** ON A/C NOT FOR ALL

E. Remove the caps from the electrical connector (3) on the electrical harness and from the actuator (4).

Left C-Duct Locking Actuator ** ON A/C NOT FOR ALL

Subtask 78-32-43-420-052-A ** ON A/C NOT FOR ALL

F. Installation of the Electrical Connector

Left C-Duct Locking Actuator ** ON A/C NOT FOR ALL

Right C-Duct Locking Actuator ** ON A/C NOT FOR ALL

(1) Connect the electrical connector (3) to the receptacle on the actuator (4) (Ref. AMM TASK 70-23-15-912-010).
(2) Tighten the electrical connector by hand plus one-eighth turn.

Subtask 78-32-43-820-050-A ** ON A/C NOT FOR ALL

G. Rig of the Thrust Reverser System
(1) Rig the translating sleeves, actuators, actuator supports and translating sleeve aft double latches (Ref. AMM TASK 78-30-00-820-010).
(2) TORQUE the rod end retaining bolts (19) to between 80 and 60 lbf.in (0.90 and 0.68 m.daN )

5. Close-up
Subtask 78-32-43-410-050-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) Install the actuator access panels

Actuator Access Panel Locations ** ON A/C NOT FOR ALL

(a) FOR [1000EM1] (ENGINE-1)
451CL 452CR
(b) FOR [1000EM2] (ENGINE-2)
461CL 462CR.
(3) Remove the access platform(s).

Subtask 78-32-43-440-050-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 78-32-43-870-050-A ** ON A/C NOT FOR ALL

C. Bleed the air from the thrust reverser hydraulic actuation system

Left C-Duct Locking Actuator ** ON A/C NOT FOR ALL

Right C-Duct Locking Actuator ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT ALL CAUGHT AIR IS BLED FROM THE SYSTEM. IF YOU DO NOT DO THIS, CAUGHT AIR CAN CAUSE UNSATISFACTORY OPERATION OF THE TRANSLATING SLEEVES. TEN CYCLES OF TRANSLATING SLEEVE POWER EXTENSION AND RETRACTION WILL REMOVE ALL CAUGHT AIR FROM THE SYSTEM.

CAUTION: YOU MUST MOVE THE LOCK LEVERS OF THE TWO LOCKING ACTUATORS AFT TO THE UNLOCKED POSITION BEFORE YOU BLEED THE SYSTEM. IF YOU DO NOT DO THIS, UNEVEN OPERATION OF THE TRANSLATING SLEEVES CAN CAUSE DAMAGE TO THE SYSTEM.

(1) Move the lock levers (7) of the left and right locking actuators (4) aft to the unlocked position and install the IAE1N20049 PIN - LOCKOUT ACTUATOR (6) to hold the lock levers in the unlocked position.
(2) Operation of system.

WARNING: MAKE SURE THAT THERE ARE NO PERSONS IN THE AREA AROUND THE THRUST REVERSER BEFORE YOU DO A POWER EXTENSION OR RETRACTION OF THE TRANSLATING SLEEVES. THE TRANSLATING SLEEVES EXTEND AND RETRACT IN 4.5 SECONDS OR LESS AND CAN CAUSE INJURY AND DAMAGE.

(a) Operate the system through ten cycles of translating sleeve power extension and retraction (Ref. AMM TASK 78-31-00-710-041).
(3) Removal of pins.

CAUTION: THE LOCKING ACTUATOR LOCK LEVERS MUST BE IN THE FORWARD LOCKED POSITION FOR FLIGHT OPERATION.

(a) Remove the lockout pins (IAE1N20049) (6) from the lock levers (7) of the left and right locking actuators (4) and move the lock levers forward to the locked position.
(4) Refill the green hydraulic reservoir for engine 1 (yellow for engine 2) (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).

Subtask 78-32-43-410-051-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).

Subtask 78-32-43-710-052-A ** ON A/C NOT FOR ALL

E. Operational Test
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).

NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).

[Rev.10 from 2021] 2026.04.01 03:28:30 UTC