CIDS-SDF Channel 1 and/or 2 Failure

TASK 26-17-00-810-823-A
CIDS-SDF Channel 1 and/or 2 Failure

1. Possible Causes

DIR-CIDS, 2 [102RH]
DIR-CIDS, 1 [101RH]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 237301
AMM 23-73-34-000-001	Removal of the CIDS Director
AMM 23-73-34-400-001	Installation of the CIDS Director
AMM 26-10-00-740-802	Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF)
ASM 261602
AWM 315219
AMM 31-53-34-000-001	Removal of the Flight Warning Computer (FWC)
AMM 31-53-34-400-001	Installation of the Flight Warning Computer (FWC)

3. Fault Confirmation
Subtask 26-17-00-865-059-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/CIDS/SDF/DIR2 ESS	18WH	C06
49VU	AIR COND/CIDS/SDF/DIR1 ESS	15WH	C05
122VU	AIR COND/CIDS/SDF/DIR NORM/2	14WH	T18
122VU	AIR COND/CIDS/SDF/DIR NORM/1	17WH	T17

Subtask 26-17-00-710-092-B ** ON A/C NOT FOR ALL

B. Test
(1) Do the SYSTEM TEST of the CIDS-SDF system.
(a) On the MCDU:

Set the "SYSTEM REPORT / TEST" page.
Set the "FIRE PROT" page.
Set the "SMOKE" (or "SDCU" and on the subsequent page "NEXT PAGE" as specified by the installed CFDIU-standard) page.
Set the "SYSTEM TEST" page in the CIDS-SDF menu.

4. Fault Isolation
Subtask 26-17-00-810-127-A ** ON A/C NOT FOR ALL

A. If the test gives a different maintenance message:

Do the trouble shooting procedure related to the maintenance message.

Subtask 26-17-00-810-128-B ** ON A/C NOT FOR ALL

B. One of these procedures is applicable:
(1) If the test gives the maintenance message: CHECK SDF1 BITE/CIDS(101RH)-SDF1 or CHECK SDF2 BITE/CIDS(102RH)-SDF2:
(a) For the maintenance message CHECK SDF2 BITE/CIDS(102RH)-SDF2:
1 Open the C/B 15WH and 17WH of the CIDS-SDF1:

On the MCDU the CIDS - SDF2 comes on.

2 On the MCDU:
a Do the Ground Scanning and read out the last Leg Report of the CIDS-SDF2 AMM 26-10-00-740-802.
b If the reports show a failure of the smoke board 2 of the DIR-CIDS, 2 [102RH] :

Replace the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 AMM 23-73-34-400-001.

c If the reports show a different maintenance message:

Do the trouble shooting procedure related to the maintenance message.

(b) For the maintenance message CHECK SDF1 BITE/CIDS(101RH)-SDF1:
1 Open the C/B 14WH and 18WH of the CIDS-SDF2:

On the MCDU the CIDS - SDF1 comes on.

2 On the MCDU:
a Do the Ground Scanning and read out the last Leg Report of the CIDS-SDF1 AMM 26-10-00-740-802.
b If the reports show a failure of the smoke board 1 of the DIR-CIDS, 1 [101RH] :

Replace the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001 AMM 23-73-34-400-001.

c If the reports show a different maintenance message:

Do the trouble shooting procedure related to the maintenance message.

(2) If the test gives the maintenance message CIDS(101RH)-SDF1 and / or CIDS(102RH)-SDF2:

Replace the DIR-CIDS, 1 [101RH] and / or DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001 and AMM 23-73-34-400-001.

(3) If the test gives the maintenance message: CIDS(102RH)-SDF2 BUS / CIDS(101RH)-SDF1 in relation with FWC1: NO DATA FROM CIDS-SDF1 and / or FWC2: NO DATA FROM CIDS-SDF2:

Do a check and repair the wiring between the CIDS Directors (pins AA11J/AA11K and AA15C/AA15H) ASM 237301.

(a) If the PFR-message is FWC1: NO DATA FROM CIDS-SDF1 and/or FWC2: NO DATA FROM CIDS-SDF1:

Do a check and repair the wiring between the related FWC and the CIDS-SDF channels AWM 315219.

(b) If the fault continues:

Do a check and repair the wiring between the circuit breakers 15WH and 17WH and the CIDS Director 1 (101RH) AC/9 and AC/10 ASM 261602.
Do a check and repair the wiring between the circuit breakers 14WH and 18WH and the CIDS Director 2 (102RH) AC/9 and AC/10 ASM 261602.

(4) If the test gives the maintenance message CIDS(101RH)-SDF1 and CIDS(102RH)-SDF2 in relation with SMOKE DET FAULT:
(a) Replace the DIR-CIDS, 101RH and/or DIR-CIDS 102RH AMM 23-73-34-000-001 and AMM 23-73-34-400-001.
(b) If the fault continues:

Do a check and repair the wiring between the circuit breakers 15WH and 17WH and the CIDS Director 1 (101RH) AC/9 and AC/10 ASM 261602.
Do a check and repair the wiring between the circuit breakers 14WH and 18WH and the CIDS Director 2 (102RH) AC/9 and AC/10 ASM 261602.

Replace the Flight Warning Computer FWC1 and/or FWC2 AMM 31-53-34-000-001 and AMM 31-53-34-400-001.

(d) If the fault continues:

Do a check and repair the wiring between the CIDS1-SDF and the FWC1 and/or FWC2 AWM 315219.
Do a check and repair the wiring between the CIDS2-SDF and the FWC1 and/or FWC2 AWM 315219.

Subtask 26-17-00-710-093-A ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.

5. Close-up
Subtask 26-17-00-860-070-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:27:22 UTC