Loss of the NLG/DLK Signal

TASK 32-42-00-810-854-A
Loss of the NLG/DLK Signal

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU
AMM 32-31-73-000-001	Removal of the MLG Proximity-Sensors
AMM 32-31-73-000-005	Removal of the NLG Proximity-Sensors
AMM 32-31-73-400-001	Installation of the MLG Proximity-Sensors
AMM 32-31-73-400-005	Installation of the NLG Proximity-Sensors
ASM 324201
AMM 32-42-34-000-001	Removal of the Braking/Steering Control Unit (BSCU)
AMM 32-42-34-400-001	Installation of the Braking/Steering Control Unit (BSCU)
AMM 32-46-00-740-001	BITE Test of the BSCU

3. Fault Confirmation
Subtask 32-42-00-740-112-A

A. Test
(1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
(2) Do the BITE test of the BSCU AMM 32-46-00-740-001.

4. Fault Isolation
Subtask 32-42-00-810-111-B

A. If the test gives the maintenance message LGCIU1(5GA1) NLG DNLK SIGNAL/BSCU (10GG) or LGCIU2(5GA2) NLG DNLK SIGNAL/BSCU(10GG):

(1) If there is a ground signal:

(a) If there is a ground signal:

(b) If there is no ground signal:

1 If the fault continues:

do a check of the wiring from the BSCU (10GG) to the LGCIU2 (5GA2) pin A/12D to pin AB/12B ASM 324201.

a If there is continuity:

b If there is no continuity:

(2) If there is no ground signal:

(a) If the fault continues:

do a check of the wiring from the BSCU (10GG) to the LGCIU1 (5GA1) pin A/11G to pin AB/12B ASM 324201.

1 If there is continuity:

a If the fault continues:

2 If there is no continuity:

Subtask 32-42-00-740-113-A

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:31:34 UTC