Aircraft Input Check (Menu Mode) [CFML]

TASK 73-29-00-740-823-A
Aircraft Input Check (Menu Mode)

1. Reason for the Job
The aircraft input check function in menu mode verifies the current status of the hardwired discrete and analog inputs from the aircraft. The function gives the operator the details that follow:

Nacelle Anti-Icing (NAI) push-button.
Auto-thrust engage.
Auto-thrust disconnect.
Thrust Control Malfunction (TCM) from SEC relay.
Local and cross channel Throttle Lever Angle (TLA) analog signal value.

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
EEC Aircraft Input Check Main Menu Screen
EEC Aircraft Input Check Special Function Screen
EEC Aircraft Input Check Screen

3. Job Set-up
Subtask 73-29-00-861-090-A

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

Subtask 73-29-00-860-134-A

B. Aircraft Maintenance Configuration
(1) On the ENG section of the maintenance panel 50VU:

Release the FADEC GND PWR 1(2) pushbutton switch (on the pushbutton switch, the ON legend comes on).

NOTE: After the FADEC is energized, you must wait 10 seconds before you start the test. If you do not wait 10 seconds, the interactive mode stops the Electronic Engine Control (EEC) self-test and this can cause unwanted fault messages.

(2) On the left or right Multipurpose Control and Display Unit (MCDU), get access to the SYSTEM REPORT/TEST/ENG page (Ref. AMM TASK 31-32-00-860-012).
(3) Make sure that the landing gear system is not simulated in the flight configuration.

4. Procedure
Subtask 73-29-00-740-064-A

A. Aircraft Input Check Menu Mode Function.
(1) The Aircraft Input Check shows the current status of the hardwired discrete and analog inputs from the aircraft. The purpose of this function is to detect if a signal monitored by the EEC operates correctly without the start of the engine to aid in troubleshooting. The inputs checked are:

NAI push-button.
Auto thrust engage.
Auto thrust disconnect.
TCM enable from SEC relay.
Local and cross channel TLA.

NOTE: Abort conditions do not apply to this function because the purpose of this function is only to display input signals.

NOTE: The representations that follow are made:

"F" = 1 digit engine designation (1 or 2)
"C" = 1 letter EEC channel designation (A or B)
"X" = Y (Yes, input discrete circuit is detected closed and valid) or N (No, input discrete circuit is detected open or invalid).
"ZZZZZ" = Local or cross channel Transcowl Locking System (TLS) value in degrees or 'INVAL' if TLA value is invalid or unaivalable.

(2) Do the aircraft input check menu mode function.

ACTION	RESULT
1.From the Menu Mode main menu, select the key adjacent to SPECIAL FUNCTIONS (2R)	The Special Functions submenu is displayed. EEC Aircraft Input Check Special Function Screen
2.From the Special Function submenu, select the key adjacent to AIRCRAFT INPUT (2R)	The Aircraft Input check screen is displayed. EEC Aircraft Input Check Screen
3.Review the information that follows displayed on the MCDU screen to make sure that it matches the current input configuration selected in the cockpit	The Aircraft Input check screen: NAI P/B Auto-thrust engage Auto-thrust disconnect TCM enable from SEC relay. Local and cross channel TLA.
4.If one or more of the displayed inputs are changed in the cockpit during the test, select the key adjacent to REFRESH (5R)	The EEC Aircraft Input Check screen must be displayed again with the updated status of the discrete inputs.
5.Select the key adjacent to RETURN (6L) in order to return to the Special Functions submenu.	The Special Functions submenu is displayed. EEC Aircraft Input Check Special Function Screen
6.Select the key adjacent to RETURN (6L) in order to return to the Menu Mode main menu	The Menu Mode screen is displayed. EEC Aircraft Input Check Screen

5. Close-up
Subtask 73-29-00-862-088-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 03:06:27 UTC