ZC receives no Data from the ADIRS

TASK 21-63-00-810-820-A
ZC receives no Data from the ADIRS

1. Possible Causes

ZONE CONTROLLER [8HK]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-63-00-710-004	Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU
ASM 216303
AMM 21-63-34-000-001	Removal of the Zone Controller
AMM 21-63-34-400-001	Installation of the Zone Controller
AMM 34-13-00-740-002	INTERFACE TEST of the ADR
ASM 341301

3. Fault Confirmation
Subtask 21-63-00-710-089-A ** ON A/C NOT FOR ALL

A. Test
(1) On the ADIRS CDU panel 20VU:

make sure that the 3 OFF/NAV/ATT switches are in the NAV position and that the ADR 1, ADR 2 and ADR 3 pushbutton switches are in the on position (with the FAULT and OFF legends off).

(2) Do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU AMM 21-63-00-710-004.

NOTE: If a fault is detected, the ZC gives a fault code for shop maintenance in addition to the related CFDS message(s). For detailed information see the applicable Page Block 301.

4. Fault Isolation
Subtask 21-63-00-810-082-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message NO DATA FROM ADIRS:

replace the ZONE CONTROLLER [8HK] AMM 21-63-34-000-001 and AMM 21-63-34-400-001.

(1) If the fault continues:

do a check and repair the wiring if necessary of the signal DATA BUS £4 from the ADIRS 3 (1FP3) to the ZC (8HK) ASM 216303 and ASM 341301.

(2) If the fault continues:

do the INTERFACE test of the ADR system AMM 34-13-00-740-002.

(a) if the test gives a different maintenance message, do the related trouble shooting procedure.

Subtask 21-63-00-710-090-A ** ON A/C NOT FOR ALL

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

5. Close-up
Subtask 21-63-00-860-069-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:25:01 UTC