Installation of the Differential Pressure Indicator (DPI)

TASK 29-13-43-400-012-A
Installation of the Differential Pressure Indicator (DPI)

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

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: 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.

FIN: 3084GM ** 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 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 130 and 110 lbf.in (1.47 and 1.24 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-146)	lockwire
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195BB, 198CB
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	RETAINER	AIPC 29-13-43-02-060
6	PACKING	AIPC 29-13-43-02-070
4	PACKING	AIPC 29-13-43-02-080

E. Referenced Information

REFERENCE	DESIGNATION
TASK 29-13-00-710-002-A	Operational Test of the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
TASK 70-40-11-911-012-A	General Instructions for the Uses of Lockwire
Differential Pressure Indicator (DPI)
FOR [1000EM2] (ENGINE-2)
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)

3. Job Set-up
Subtask 29-13-43-860-060-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-24-00-864-001).
(2) Make sure that the Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) On ground service panel 198CB:

Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system.

(4) On access door 195BB:

Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic reservoir.

(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the engine.
(6) Make sure that the fan cowls are open:
(a) FOR [1000EM2] (ENGINE-2)
447AL 448AR (Ref. AMM TASK 71-13-00-010-010).

Subtask 29-13-43-941-060-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:

Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to start the engine.

(2) Make sure that engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) In the cockpit, on the HYD section of overhead panel 40VU:

Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system.

(4) On overhead maintenance panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

(5) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to energize FADEC 1(2).
(6) Make sure that a CONTAINER 5 L (1.32 USGAL) is in position below the DPI.

4. Procedure
Subtask 29-13-43-420-055-A ** ON A/C NOT FOR ALL

A. Installation of the DPI
(1) Install the new AIPC 29-13-43-02-060 RETAINER (3), new AIPC 29-13-43-02-070 PACKING (6) and new AIPC 29-13-43-02-080 PACKING (4) on the DPI (2).
(2) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the retainer (3), packings (4) and (6) and threads on the DPI (2).

CAUTION: THE DIFFERENTIAL PRESSURE INDICATOR (DPI) AND SPRING ARE A MATCHED PAIR.

(3) Install the spring (5) in the head (1).
(4) Install the DPI (2) in the head (1) and tighten with your hand.
(5) TORQUE the DPI (2) to between 130 and 110 lbf.in (1.47 and 1.24 m.daN )

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(6) Safety the DPI (2) with the lockwire (Material No.V02-146) (Ref. AMM TASK 70-40-11-911-012).

Subtask 29-13-43-710-056-A ** ON A/C NOT FOR ALL

B. Operational Test
(1) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(2) During the dry motoring of the engine, make sure that:

There are no leaks from the DPI and that it is not extended.

5. Close-up
Subtask 29-13-43-942-056-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Remove the container.
(3) Make sure that the work area is clean and clear of tools and other items.

Subtask 29-13-43-410-056-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the fan cowls:
(a) FOR [1000EM2] (ENGINE-2)
447AL 448AR (Ref. AMM TASK 71-13-00-410-010).
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 07:54:27 UTC