FDIMU Receives No Data from the PC 2 (ACSC 2)

TASK 31-36-00-810-930-A
FDIMU Receives No Data from the PC 2 (ACSC 2)

1. Possible Causes

wiring
CONT-AIR COND SYSTEM 2 [57HH]
DMU/FDIU (FDIMU) [10TV]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-61-00-710-001	Operational Test of the Pack Temperature-Control System
AMM 31-36-00-740-012	Test of the Flight Data Interface and Management Unit (FDIMU)
AMM 31-36-34-000-002	Removal of the FDIU/DMU (FDIMU)
AMM 31-36-34-400-002	Installation of the FDIU/DMU (FDIMU)
ASM 313701

3. Fault Confirmation
Subtask 31-36-00-740-223-A ** ON A/C NOT FOR ALL

A. Do the FDIMU (10TV) fault monitoring test (AIDS-part) AMM 31-36-00-740-012.

NOTE: Make sure that the circuit breakers 5TV on the panel 121VU and 21HH, 22HH, 23HH and 24HH on the panel 122VU are closed during the test.

4. Fault Isolation
Subtask 31-36-00-810-144-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:

ACSC 2 (57HH) / FDIMU (10TV)

(1) Do the operational test of the Pack Temperature-Control System AMM 21-61-00-710-001.

(a) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 201.

(2) If the fault continues:

do a check and if necessary repair the wiring between the CONT-AIR COND SYSTEM 2 [57HH] and the DMU/FDIU (FDIMU) [10TV] ASM 313701:

ACSC 1 Connector AB/11B to FDIMU Connector AA/2C
ACSC 1 Connector AB/11C to FDIMU Connector AA/2D.

(3) If the fault continues:

replace the FDIMU (10TV) AMM 31-36-34-000-002 and AMM 31-36-34-400-002.

Subtask 31-36-00-740-224-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:08 UTC