Installation of the Engine Identification Connector [CFMB]

TASK 73-21-90-400-002-A
Installation of the Engine Identification Connector

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

ZONE: 400
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	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-32-00-860-012-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
TASK 31-36-00-740-014-A	Update of the Engine Hours and Cycles in the Flight Data Interface and Management Unit (FDIMU)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-21-60-720-040-B	Functional Test of the Electronic Control Unit (ECU)
TASK 73-21-60-740-006-A	Read the LRU Identification Report and the Thrust Reverser Shut-off Valve Status
Identification Connector

3. Job Set-up
Subtask 73-21-90-860-051-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).

Subtask 73-21-90-010-053-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 73-21-90-420-051-B ** ON A/C NOT FOR ALL

A. Installation of the Engine Identification Connector (Push-Pull Design)
(1) Install the identification connector (push-pull design) as follows:
(a) Attach the terminal lug of the identification connector using the nut (50), the washer (60) and the bolt (40) to the metallic clamp holding the elastomer block (through which transit the electrical harnesses).
(b) Connect the connector to the J14 receptacle on the ECU.

Subtask 73-21-90-942-051-A ** ON A/C NOT FOR ALL

B. Remove the WARNING NOTICE(S).

Subtask 73-21-90-861-051-A ** ON A/C NOT FOR ALL

C. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 73-21-90-740-053-A ** ON A/C NOT FOR ALL

D. Update the engine hours and cycles (Ref. AMM TASK 31-36-00-740-005).

NOTE: Some tasks will possibly not be applicable depending on whether a DMU or an FDIMU is installed on the aircraft.

Subtask 73-21-90-710-051-A ** ON A/C NOT FOR ALL

E. Do this test
(1) On the left or right MCDU, do this check:
(a) Get access to the screen of the SYSTEM REPORT/TEST ENG (Ref. AMM TASK 31-32-00-860-012).
(b) Push the line key adjacent to the FADEC1(2) A(B): The ENGINE MAIN MENU page comes into view.
(c) Do a functional test of the ECU (Ref. AMM TASK 73-21-60-720-040).
(d) Read the LRU IDENTIFICATION Report of the engine 1(2) (Ref. AMM TASK 73-21-60-740-006).

NOTE: The LRU identification check is only required on one channel of the ECU A or B.

1 Push the line key adjacent to the LRU IDENT indication: CHANNEL A(B) page comes into view.
2 Read the data that comes on the MCDU screen and check for consistency with the actual engine configuration:
a Engine thrust rating and type:

These inputs are available on the engine name plate.

NOTE: The engine thrust rating must be the same as on opposite engine and consistent with the Aircraft Model.

b "LRU PART NO" (ECU Part Number):

The P/N is available on the ECU identification plate.

NOTE: Make sure that the intermix ability of both ECU standards is correct.

c "N1 TRIM":

The N1 trim level (0 through 7) is available on the engine name plate.

d "BUMP" option: must read "N".
e If "OVERBOOST" is displayed on the screen: must read "N".
f "PMUX" option:

PMUX engine (4 hoses connected to the ECU) must read "Y"
Non PMUX engine (2 hoses connected to the ECU) must read "N".

g If "CONFIG" is displayed on the screen:

"RACSB" applies to CFM56-5BX non/P equipped with a RACSB Valve,
"TBV" applies to CFM56-5BX/P equipped with a TBV Valve.

h If "EGT MON" is displayed on the screen: must read "N".
i "ENGINE" (Engine Serial Number)

Make sure the S/N displayed on the screen is the same as the one written on the Engine name plate.

NOTE: For CFM56-5B-non/P: if a pre Service Bulletin 72-215 engine identification connector is installed (P/N 320-XXX-XXX-0), the ESN (Engine Serial Number) is automatically entered into the ECU memory through a specific progamming of the identification connector.

Subtask 73-21-90-862-051-A ** ON A/C NOT FOR ALL

F. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

5. Close-up
Subtask 73-21-90-410-051-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) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

[Rev.10 from 2021] 2026.04.01 13:05:52 UTC