Removal of the Head Supply Pipe of the Left Actuator [CFMI]

TASK 78-31-49-000-009-A
Removal of the Head Supply Pipe of the Left Actuator

WARNING: WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU WORK ON PRESSURIZED SYSTEMS.

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

CAUTION: MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND ORIFICES OR DAMAGE CAN OCCUR.

CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.

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

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 260 and 235 lbf.in (2.94 and 2.66 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
Forward Frame of the Half Door
Forward Frame of the Half Door
Supply Pipes - Left Actuator

3. Job Set-up
Subtask 78-31-49-941-058-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 78-31-49-010-058-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-31-49-040-082-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 78-31-49-680-058-A ** ON A/C NOT FOR ALL

D. Drain of the Right Actuator Head Supply-pipe.
(1) Put a CONTAINER 5 L (1.32 USGAL) under the actuator of the lower blocker door.

Forward Frame of the Half Door ** ON A/C NOT FOR ALL

(2) Disconnect the head supply hose from the lower actuator and let the hydraulic fluid drain completely.
(3) Reconnect the head supply hose on the actuator.
(4) TORQUE nut to between 260 and 235 lbf.in (2.94 and 2.66 m.daN )

.
(5) Remove the container.

4. Procedure
Subtask 78-31-49-020-057-A ** ON A/C NOT FOR ALL

A. Remove the Head Supply Pipe of the Left Actuator.
(1) Remove the upper half clamp of upper hydraulic line bracket.
(2) Remove the nuts and bolts.
(3) Remove the flange and the upper half clamp.
(4) Remove the half clamps which attach the electrical harness on the rod and head supply pipes.
(a) Remove nut, washer, bolt and clamp.
(b) Remove the two half clamps.
(5) Disconnect the interface hydraulic hose from the head supply pipe of the left.
(6) Disconnect the head supply pipe from the interface bracket and the middle hydraulic line bracket.
(7) Remove the supply pipe.
(8) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 03:21:30 UTC