Removal of the C-Duct Locking Actuator [IAE]

TASK 78-32-43-000-010-A
Removal 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 remove the left and the 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	CAP - BLANKING
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	WARNING NOTICE(S)
IAE1N20049	4	PIN - LOCKOUT ACTUATOR

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening 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 78-32-00-860-010-A	Manual Extension of the Thrust Reverser Translating Sleeves
TASK 78-32-19-000-010-A	Removal of the Thrust Reverser Deflector Boxes
TASK 78-32-41-000-010-A	Removal of the Left Thrust Reverser Manual Drive Mechanism
TASK 78-32-44-000-010-A	Removal of the Left C-Duct Flexible Synchronous Cables and Tubes
Actuator Access Panel Locations
Left C-Duct Locking Actuator
Right C-Duct Locking Actuator
Forward and Aft Supports and Rod-end Connection
Forward and Aft Supports and Rod-End Connection

3. Job Set-up
Subtask 78-32-43-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 78-32-43-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-32-43-040-050-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser

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) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-43-010-051-A ** ON A/C NOT FOR ALL

D. Remove the access panel for the applicable actuator:

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

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

Subtask 78-32-43-980-050-A ** ON A/C NOT FOR ALL

E. Preparation before removal
PRE SBN 78-0199
(1) Put the locking actuators in the unlocked position

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

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

(a) 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) Manually extend the translating sleeve approximately 2 to 3 in. (50.8 to 76.2 mm) to decrease the pressure on the seal (Ref. AMM TASK 78-32-00-860-010).

NOTE: Count and write the number of turns necessary to move the translating sleeve in this operation.

Subtask 78-32-43-980-052-A ** ON A/C NOT FOR ALL

F. Preparation before removal
SBN 78-0199

NOTE: It may be required to remove the blank cascade to gain access to the loose cushion half bolts (32) at the aft end of the actuator (Ref. AMM TASK 78-32-19-000-010).

(1) Put the locking actuators in the unlocked position.

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

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

(a) 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) Manually extend the translating sleeve approximately 2 in. (50.80 mm) to 3 in. (76.20 mm) to decrease the pressure on the seal (Ref. AMM TASK 78-32-00-860-010).

NOTE: Count and write the number of turns necessary to move the translating sleeve in this operation.

4. Procedure
Subtask 78-32-43-020-051-A ** ON A/C NOT FOR ALL

A. Disconnect the electrical connector (3) from the locking actuator (4)

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

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

Subtask 78-32-43-620-050-A ** ON A/C NOT FOR ALL

B. Install a CAP - BLANKING on the electrical connector (3) and on the receptacle on the actuator (4)

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

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

Subtask 78-32-43-020-053-A ** ON A/C NOT FOR ALL

C. Remove the manual drive mechanism (Ref. AMM TASK 78-32-41-000-010).

Subtask 78-32-43-941-051-A ** ON A/C NOT FOR ALL

D. Put a clean CONTAINER 5 L (1.32 USGAL) below the hydraulic connections on the locking actuator.

Subtask 78-32-43-020-052-A ** 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. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

E. Disconnect the hydraulic tubes

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

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

NOTE: Before disconnecting the tubes, put the non-return valve in the close position. If the tubes are disconnected with the valve in the by-pass position, the reservoir will drain due to gravity.

(1) Disconnect the lower hydraulic tube (1) from the actuator (4)
(a) Disconnect the B-nut of the lower hydraulic tube from the actuator (4).
(b) Remove two or three of the tube clamps which hold the lower hydraulic tube to the C-duct (Ref. AMM TASK 78-32-44-000-010).

NOTE: The removal of the tube clamps permits the tube to be moved enough to disconnect it from the actuator.

(c) Disconnect the lower hydraulic tube from the actuator.
(2) Disconnect the lower flexshaft/tube (2) from the actuator (4)
(a) Loosen the locknut (8) at the end of the lower flexshaft/tube.
(b) Disconnect the tube nut (9) from the actuator and pull the telescoping end fitting of the lower flexshaft/tube up from the actuator.
(c) Removal of the flexshaft from the actuator

CAUTION: DO NOT REMOVE THE TRIANGULAR-FLANGED-ADAPTERS WITH THREE WIRELOCKED BOLTS. IF THE TRIANGULAR-FLANGED-ADAPTER IS REMOVED, DAMAGE TO THE ACTUATOR CAN OCCUR.

1 Remove the flexshaft (10) from the actuator.

NOTE: Do not turn the flexshaft more than one eighth of a turn while one end is still engaged.

Subtask 78-32-43-620-051-A ** ON A/C NOT FOR ALL

F. Install CAP - BLANKING on the tubes (1) and (2) and on the connections on the locking actuator (4).

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

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

Subtask 78-32-43-020-050-C ** ON A/C NOT FOR ALL

G. Disconnect and remove the locking 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
(1) Disconnect the locking actuator from the forward and aft supports
(a) Remove the two actuator pins (28) that attach the actuator to the forward support (29)
1 Remove the two actuator retainer pins (27).
2 Remove the actuator pins (28) from the actuator and the forward support (29).
(b) Remove the bolt (19) and the bushing (20) that attach the actuator rod end to the translating sleeve bracket (18).
(c) Remove the actuator from the aft support (34)
1 Make a mark on each cushion half (24). These marks will be used to align the cushion halves on installation.

NOTE: The loose cushion half installed on the actuator is not concentric. When it is to be installed it must be installed in the same position from which it was removed. Make a mark on it before you remove it.

2 Remove the two nuts (36) and (37), four washers (33) and (38), clamp half (35), loose cushion half (24) and two bolts (32) and (39).
(2) Remove the locking actuator
(a) Move the actuator away from the aft support (34).
(b) Move the actuator forward and remove it through the C-duct fixed structure.
(c) Carefully move the seal (26) to the rear, off the actuator.

Subtask 78-32-43-942-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 13:12:13 UTC