Access to the #quot#On Ground#quot# CFDS Menu Not Available on the Ground

TASK 31-32-00-810-949-A
Access to the "On Ground" CFDS Menu Not Available on the Ground

1. Possible Causes

wiring
CFDIU [1TW]
RELAY-A/C ON GND [95CV]
RELAY-A/C ON GND [97CV]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2046500
AMM 31-32-00-860-001	Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
ASM 313203
AWM 313215
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU

3. Fault Confirmation
Subtask 31-32-00-865-184-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
121VU	EIS/FWC2/SPLY	2WW	Q07
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32

Subtask 31-32-00-700-051-A

B. On the CFDS MENU page, get access to the SYSTEM REPORT/TEST page AMM 31-32-00-860-001.
(1) If the access to the SYSTEM REPORT/TEST page is not possible, go to the Para. Fault Isolation.

4. Fault Isolation
Subtask 31-32-00-810-205-A

A. If there is confirmation of the fault:
(1) Do a check and repair if necessary the wiring from CFDIU (1TW) pins AB/5F, 5G to the FWC2 (1WW2) pins AB/12J, 12K ASM 313203.
(2) If the fault continues:
(a) Do a check and repair if necessary the wiring from the CFDIU (1TW) pin AA/1H to the LGCIU1 (5GA1) pin AB/15C AWM 313215.
(3) If the fault continues:
(a) Replace the CFDIU [1TW] AMM 31-32-34-000-001 and AMM 31-32-34-400-001.
(4) If the fault continues:
(a) Replace the RELAY-A/C ON GND [95CV] ESPM 2046500.
(5) If the fault continues:
(a) Replace the RELAY-A/C ON GND [97CV] ESPM 2046500.

Subtask 31-32-00-740-325-A

B. Do the test given in para. 3.B.

[Rev.8 from Aug 2018] 2026.04.04 04:29:59 UTC