Read Previous Legs Report (Menu mode) [CFML]

TASK 73-29-00-740-816-A
Read Previous Legs Report (Menu mode)

ZONE: 400

1. Reason for the Job
The Previous Leg Report, accessible in Menu Mode, provides all class 1 and class 2 faults (up to 12 per flight) detected in the 63 flights prior to the last flight. The Previous Legs Report is used to review the faults detected in order to take corrective action during a scheduled maintenance check.
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

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 31-32-00-860-001-A	Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
TASK 31-60-00-860-002-A	EIS Stop Procedure
Menu Mode Main Menu (Screen 1)
Previous Legs Report Screen (Screen 2)
Previous Legs Report No Faults Screen (Screen 3)
Previous Legs Report Non-Volatile Memory (NVM) Fault Screen (Screen 4)

3. Job Set-up
Subtask 73-29-00-861-082-A

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

Subtask 73-29-00-865-095-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 73-29-00-860-122-A

C. Aircraft Maintenance Configuration
(1) On the ENG section of maintenance panel 50VU:
(a) Push the FADEC GND PWR 1(2) pushbutton switch.
(b) The ON legend of this pushbutton switch comes on.
(2) On AIR COND panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (ON legend off).
(b) Install a WARNING NOTICE(S) to tell the persons not to use it.
(3) Put a WARNING NOTICE(S) on the High Pressure (HP) ground connector to tell the persons not to pressurize the pneumatic system.
(4) On the overhead panel, on the ADIRS CDU, set the three OFF/NAV/ATT selector switches to NAV.
(5) On the left or right MCDU, get the SYSTEM REPORT/TEST ENG menu page (Ref. AMM TASK 31-32-00-860-001).

4. Procedure
Subtask 73-29-00-710-088-A

A. General
(1) The Previous Legs Report format (most recent 100 class 1 and 2 faults only) detected in the 63 flights prior to the last flight shall be as shown in figure (screen 2). Maximum of 12 faults will be displayed per flight leg.
(2) Flight Leg numbers shall be displayed in reverse chronological order and the faults within each leg are displayed in chronological order with the oldest fault first. Fault description and troubleshooting guidance is provided by the Trouble Shooting Manual (TSM).

Subtask 73-29-00-740-059-A

B. Review the Last Leg Report in Menu Mode

NOTE: The EEC will not enter the menu mode (interactive mode) after an enquire command from the CFDS (Centralized Fault Display System) when any of the following conditions are set:

N2 more than ten percent or invalid
Rotary selector on CRANK or IGN/START or invalid
Manual Start Button on ON or invalid
TLA (Throttle Lever Angle) not at idle or invalid
Aircraft in the air
MASTER lever ON or invalid
BITE command code input label invalid.

NOTE: EEC Menu Mode will be terminated without displaying a termination screen if any of the following conditions occur:

The RETURN key is selected on the main menu screen
Engine start is detected
Mach is greater than 0.12 or invalid
Aircraft indicates it is in air.

ACTION	RESULT
1.Initialize Menu Mode on the applicable engine and EEC channel, by selecting FADEC XY (X = Engine Position, Y = Channel Designation). NOTE: If one of the following conditions occurs while menu mode is active, Menu Mode session will be exited directly, without displaying a specific screen: RETURN key selected on main menu screen Channel in Menu Mode is not the active channel Invalid BITE command or Invalid equipment code received by EEC A LOGOFF condition received by EEC Engine start detected whereas function requiring idle speed (as Idle test, Vibration Ground Run) is not active Selected Mach more than 0.12 or invalid Aircraft indicates in air.	The Menu Mode main menu is displayed for the applicable engine and EEC channel. Menu Mode Main Menu (Screen 1)
2.From the Menu Mode main menu, select the key adjacent to Previous legs Report (2L).	The Previous Leg Report screen is displayed, providing fault information. Previous Legs Report Screen (Screen 2)
	NOTE: Fault information may be displayed on multiple screens depending on the number of faults detected.
	If no Previous Legs Report faults have been detected, the Previous Legs Report no faults recorded screen is displayed. Previous Legs Report No Faults Screen (Screen 3)
	If EECNVM is corrupted and the EEC is unable to retrieve the relevant faults and/or information, the Previous Legs Report NVM fault screen is displayed. Previous Legs Report Non-Volatile Memory (NVM) Fault Screen (Screen 4) Verify no EEC Non-Volatile Memory (NVM), CCDL, or Central Processing Unit (CPU) faults are present (follow corrective action per TSM if the faults present) and re-attempt to review the Previous Legs Report. If again unsuccessful, attempt to review the Previous Legs Report on the opposite EEC channel.
3.Review the Previous Legs Report fault maintenance information displayed on the screen. Address the active faults as necessary per TSM.
4.When complete, select the key adjacent to RETURN to return to the Menu Mode main menu.	The Menu Mode main menu is displayed for the applicable engine and EEC channel. Menu Mode Main Menu (Screen 1)
5.Repeat the steps above for the other EEC channel. Each EEC channel will only display faults for that channel. For all engine previous leg faults, the report should be run on both channels.

5. Close-up
Subtask 73-29-00-860-123-A

A. Put the aircraft back to its initial configuration.
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Release the FADEC pushbutton switch.
(3) On the ADIRS CDU, set the tree OFF/NAV/ATT selector switches to OFF.
(4) Close the OMS session (Ref. AMM TASK 31-60-00-860-002).

Subtask 73-29-00-862-082-A

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

[Rev.10 from 2021] 2026.04.01 03:06:22 UTC