Test of the Air Data Module without the CFDS

TASK 34-11-17-710-001-A
Test of the Air Data Module without the CFDS

ZONE: 210

1. Reason for the Job
Do this test after the removal/installation of the Air Data Module when the CFDS is unserviceable.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 34-10-00-860-002-A	ADIRS Start Procedure
TASK 34-10-00-860-005-A	ADIRS Stop Procedure

3. Job Set-up
Subtask 34-11-17-860-051-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Do the ADIRS start procedure (ADIRU related to the installed ADM only)
(Ref. AMM TASK 34-10-00-860-002)
(3) Do the EIS start procedure (PFD only).
(Ref. AMM TASK 31-60-00-860-001)

Subtask 34-11-17-010-051-A

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(2) Open the access door 822.
(3) On the battery power center 105VU:

loosen the two screws and remove the protective cover.

Subtask 34-11-17-865-053-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	NAV PROBES/ADIRU1/115VAC	4FP1	F06
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
121VU	ADIRS/ADIRU/2/115VAC	4FP2	N06
121VU	ADIRS/ADIRU/3/115VAC	4FP3	N05
121VU	ADIRS/ADIRU/2/28VDC	6FP2	N04
121VU	ADIRS/ADIRU/3/28VDC	6FP3	N03

4. Procedure
Subtask 34-11-17-710-051-A

A. Make sure that the PFD of the onside ADIRU related to the installed ADM shows the correct altitude (the ALT flag goes out of view and the SPD flag goes out of view on the speed scale).

NOTE: To do the check of the altitude display with the ADIRU3 set the AIR DATA selector switch to CAPT/3 (F/O/3) on the SWITCHING panel 8VU.

5. Close-up
Subtask 34-11-17-860-052-A

A. Put the aircraft back to its initial configuration.
(1) Do the ADIRS Stop Procedure (Ref. AMM TASK 34-10-00-860-005).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 34-11-17-410-051-A

B. Close Access
(1) Install the protective cover on the battery power center 105VU.
(2) Tighten the two screws.
(3) Close the access door 822.
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 07:14:00 UTC