Loss of the Comunication from DLRB

TASK 36-11-00-810-A13-A
Loss of the Comunication from DLRB

1. Possible Causes

ROUTING BOX-DATA LOADING [102TD]
wiring
BMC-1 [1HA1]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-38-34-000-001	Removal of the Data Loading Routing Box (DLRB)
AMM 31-38-34-400-001	Installation of the Data Loading Routing Box (DLRB)
AMM 36-11-00-740-802	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
ASM 361103
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC

3. Fault Confirmation
Subtask 36-11-00-740-107-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test EBAS AMM 36-11-00-740-802.

4. Fault Isolation
Subtask 36-11-00-810-433-A ** ON A/C NOT FOR ALL

A. If the test shows the maintenance message:
NO DATA FROM DLRB
(1) Replace the ROUTING BOX-DATA LOADING [102TD] AMM 31-38-34-000-001 and AMM 31-38-34-400-001.

Subtask 36-11-00-810-434-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Do a check of the wiring from DLRB (102TD) pin A/37 and pin A/4 to BMC1 (1HA1) pin AA/13D and pin AA/13C ASM 361103.
(2) Do a check of the wiring from DLRB (102TD) pin A/20 to BMC1 (1HA1) pin AA/14G ASM 361103.
(3) Do a check of the wiring from DLRB (102TD) pin B/25 and pin B/41 to BMC1 (1HA1) pin AA/13B and pin AA/15B ASM 361103.
(4) If the wiring is damaged:

Repair or replace the wiring .

Subtask 36-11-00-810-435-A ** ON A/C NOT FOR ALL

C. If the fault continues:
(1) Replace the BMC-1 [1HA1] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

[Rev.8 from Aug 2018] 2026.04.04 04:33:55 UTC