Operational Test of the Automatic Call Out with the Radio Altimeter Simulator

TASK 31-50-00-710-009-A
Operational Test of the Automatic Call Out with the Radio Altimeter Simulator

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 210

1. Reason for the Job
To make sure that the operation and the inhibition of the announcements are correct.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	BOOMSET 600 OHMS
DRA707B1	1	TEST SET-DIGITAL RADIO ALTIMETER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
152HW, 826

C. Referenced Information

REFERENCE	DESIGNATION
TASK 21-26-00-860-001-A	Configuration of the Avionics Compartment Ventilation System
TASK 21-26-00-860-001-A-01	Configuration of the Avionics Compartment Ventilation System
TASK 31-50-00-740-002-A	Read and Decode the Hardware Pin Programming of the SDAC and FWC
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
ASM 315201

3. Job Set-up
Subtask 31-50-00-860-070-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the aft cargo compartment door 826.
(2) Open the aft cargo compartment door 826.
(3) Remove the access panel 152HW.
(4) Connect the DRA707B1 TEST SET-DIGITAL RADIO ALTIMETER to the face of the transceiver.
(5) Do the EIS start procedure (PFDs only) (Ref. AMM TASK 31-60-00-860-001).
(6) On the overhead panel, on the ADIRS CDU, set the OFF/NAV/ATT selector switches to NAV.

Subtask 31-50-00-860-070-F ** ON A/C NOT FOR ALL

Subtask 31-50-00-865-060-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	COM NAV/RAD ALTM/2	1SA2	K12
121VU	COM NAV/RAD ALTM/1	1SA1	K11

4. Procedure
Subtask 31-50-00-710-084-A ** ON A/C NOT FOR ALL

A. Check of the Automatic Call-Out Announcements Pin-Programmed in the FWCs

NOTE: The Aircraft Schematic Manual (ASM) gives the auto call-out announcements pin-programmed in the FWCs ASM 315201. You can hear these announcements during A/C operation if their related pins are connected to the ground.

NOTE: During this test, you will not hear the MINIMUM and HUNDRED ABOVE call-outs (if the related FWC pins are grounded or not).

NOTE: You can do this procedure with the FWC1 or the FWC2.
This procedure is for the FWC1. For the FWC2, use the indications between the parentheses.

(1) Read the pin programming related to the FWC1 (2) (Ref. AMM TASK 31-50-00-740-002).
(2) Compare the pin programming related to the FWC1 (2) with the state of the aircraft pin programming given in the ASM ASM 315201.

Subtask 31-50-00-910-051-A ** ON A/C NOT FOR ALL

B. Cautions
(1) If you hear a continuous sound, push the MASTER WARN light.
(2) If, during the test, the FAULT legend of the BLOWER pushbutton switch on the panel 22VU comes on.
(a) Stop the test.
(b) Do the configuration procedure of the avionics compartment ventilation system (Ref. AMM TASK 21-26-00-860-001).
(c) Do the test again.

Subtask 31-50-00-710-065-A ** ON A/C NOT FOR ALL

C. System Test

NOTE: This test is for RA1. For RA2, you must open the circuit breaker 1SA1.

NOTE: Use the BOOMSET 600 OHMS to speak to the person in the aft cargo compartment and in the cockpit.

ACTION	RESULT
On the RA simulator: set these values: * START ALT : 0 ft. * STOP ALT : 2500 ft. * SLOPE : 25 ft/s.
the test starts	On the CAPT and F/O PFDs, the ramp test starts. The altitude scale moves up to 2500 ft. and stops after approximately 1 minute 40 seconds.
the test stops	On the CAPT and F/O PFDs, the radio altitude data go out of view.

Subtask 31-50-00-710-066-A ** ON A/C NOT FOR ALL

D. System Test

NOTE: This test is for RA1. For RA2, you must open the circuit breaker 1SA1.

NOTE: Use the BOOMSET 600 OHMS to speak to the person in the aft cargo compartment and in the cockpit.

ACTION	RESULT
On the RA simulator: set these values: * START ALT : 2500 ft. * STOP ALT : 0 ft. * SLOPE : 25 ft/s.
the test starts.	On the CAPT and F/O PFDs, the ramp test starts. The altitude scale moves down from 2500 ft to 0ft. and stops after approximately 1 minute 40 seconds.
the test stops.	On the CAPT and F/O PFDs, the radio altitude data go out of view.

NOTE: The 2500ft call out is not triggered, even if it is activated, because the ramp test begins at 2500ft.

5. Close-up
Subtask 31-50-00-860-071-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) On the overhead panel, on the ADIRS CDU, set the OFF/NAV/ATT selector switches to OFF.
(3) Disconnect the RA simulator.
(4) Install the access panel 152HW.
(5) Close the aft cargo compartment door 826.
(6) Remove the access platform(s).

Subtask 31-50-00-860-071-E ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) On the overhead panel, on the ADIRS MSU, set the OFF/NAV/ATT selector switches to OFF.
(3) Disconnect the RA simulator.
(4) Install the access panel 152HW.
(5) Close the aft cargo compartment door 826.
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:37:14 UTC