Entry of the Core Chevron Nozzle Status Through MCDU [CFMB]

TASK 73-21-60-740-005-A
Entry of the Core Chevron Nozzle Status Through MCDU

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. 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
CORE CHEVRON NOZZLE - MCDU Screen

3. Job Set-up
Subtask 73-21-60-861-068-A ** ON A/C NOT FOR ALL

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

Subtask 73-21-60-869-070-A ** ON A/C NOT FOR ALL

B. Preparation for test
(1) On the overhead maintenance panel 50VU, push then release the ENG/FADEC GND PWR/1(2) pushbutton switch. The ON legend comes on.
(2) On the left or right MCDU get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012).

4. Procedure
Subtask 73-21-60-740-067-A ** ON A/C NOT FOR ALL

A. Do this procedure for the ECU 1(2) channel A.

CORE CHEVRON NOZZLE - MCDU Screen ** ON A/C NOT FOR ALL

NOTE: This test is for the system 1. For the other system(s), use the indications between the parentheses.

ACTION	RESULT
1.On the MCDU:
Push the line key adjacent to the FADEC 1A (2A) indication.	The ENGINE 1(2) MAIN MENU page comes into view.
2.Push the line key (3L) adjacent to the LRU IDENT REPORT indication.	The LRU IDENTIFICATION page comes into view.
3.Push the line key (5L) adjacent to the CONFIG CHANGE indication
Push the line key (4R) adjacent to the CC NOZ STATUS CHANGE indication	The CORE CHEVRON NOZZLE page comes into view.
4.On the MCDU keyboard, enter the status of the Core Chevron Nozzle (Y or N), and push the line key (5R) adjacent to the ENTER CCN CFG STATUS indication.

NOTE: Core Chevron Nozzle is identified by 8 chevrons (triangular) around the circumference of the exit surface (SB RA32078-117).

(1) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) Stop the MCDU.

5. Close-up
Subtask 73-21-60-860-073-A ** ON A/C NOT FOR ALL

A. On the overhead maintenance panel 50VU:

Push the ENG/FADEC GND PWR 1(2) pushbutton switch. The ON legend goes off.

Subtask 73-21-60-862-067-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 12:55:16 UTC