Operational Test of the High Frequency (HF) System

TASK 23-11-00-710-001-A
Operational Test of the High Frequency (HF) System

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.

WARNING: DO NOT TRANSMIT WITH THE HF SYSTEM DURING REFUEL/DEFUEL OR TRANSFER OPERATIONS. TRANSMISSION WITH THE HF SYSTEM DURING THESE FUEL OPERATIONS CAN CAUSE INJURY AND/OR START A FIRE.

NOTE: During this test, the aircraft must be in an open area.

NOTE: The transmission and reception test of the HF system is the same for all the crew stations. You must do the test at each crew station.

ZONE: 210

1. Reason for the Job
To make sure that the reception and transmission from each station operate correctly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	BOOMSET 600 OHMS

B. Work Zones and Access Panels

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

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)

3. Job Set-up
Subtask 23-11-00-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the face of the transceiver, make sure that no lights are on.
(3) Connect a BOOMSET 600 OHMS to the jack panel at all the crew stations.

Subtask 23-11-00-860-050-B ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the face of the transceivers, make sure that no lights are on.
(3) Connect a BOOMSET 600 OHMS to the jack panel at all the crew stations.

Subtask 23-11-00-865-067-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
49VU	COM/RMP/1	2RG1	G10
** ON A/C NOT FOR ALL
49VU	COM/AUDIO/ACP/F/O	5RN	G07
** ON A/C NOT FOR ALL
49VU	COM/AUDIO/FLT/INTPH	9RN	G08
49VU	COM/AUDIO/ACP/CAPT	4RN	G06
** ON A/C NOT FOR ALL
49VU	COM/ACP F/O/BITE/ INT 2 AUDIO/3&5 OCCPNT	5RN	G07
** ON A/C NOT FOR ALL
49VU	COM/INT/1+2	9RN	G08
49VU	COM/ACP CAPT/SELCAL/INT 1 AUDIO/AVNCS	4RN	G06
** ON A/C NOT FOR ALL
49VU	HF1	1RE1	HA14
** ON A/C NOT FOR ALL
121VU	COM NAV/SELCAL	8RN	M04
121VU	COM NAV/ACP/THIRD/OCCPNT	6RN	M02
** ON A/C NOT FOR ALL
121VU	COM NAV/HF2	1RE2	L13
** ON A/C NOT FOR ALL
121VU	COM NAV/ACP/FOURTH/OCCPNT	20RN	M01

Subtask 23-11-00-875-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/RMP/1	2RG1	G10
** ON A/C NOT FOR ALL
49VU	COM/AUDIO/ACP/F/O	5RN	G07
** ON A/C NOT FOR ALL
49VU	COM/AUDIO/FLT/INTPH	9RN	G08
49VU	COM/AUDIO/ACP/CAPT	4RN	G06
** ON A/C NOT FOR ALL
49VU	COM/ACP F/O/BITE/ INT 2 AUDIO/3&5 OCCPNT	5RN	G07
** ON A/C NOT FOR ALL
49VU	COM/INT/1+2	9RN	G08
49VU	COM/ACP CAPT/SELCAL/INT 1 AUDIO/AVNCS	4RN	G06
** ON A/C NOT FOR ALL
49VU	HF1	1RE1	HA14
** ON A/C NOT FOR ALL
121VU	COM NAV/SELCAL	8RN	M04
121VU	COM NAV/ACP/THIRD/OCCPNT	6RN	M02
** ON A/C NOT FOR ALL
121VU	COM NAV/HF2	1RE2	L13
** ON A/C NOT FOR ALL
121VU	COM NAV/ACP/FOURTH/OCCPNT	20RN	M01

4. Procedure

WARNING: OBEY THE RADIO REGULATIONS AND MAKE SURE THAT THE FREQUENCY IS AVAILABLE BEFORE YOU TRANSMIT.

CAUTION: IF THE TRANSCEIVER FAN DOES NOT OPERATE STOP THE TRANSMISSION IMMEDIATELY.

Subtask 23-11-00-710-050-A ** ON A/C NOT FOR ALL

A. Operational Test of the HF System

ACTION	RESULT
1.On the RMP1:
Set the ON/OFF selector switch to ON.	The RMP shows the last frequencies and the last function used.
Push the HF1 pushbutton switch.	The green LED on this pushbutton switch comes on.
In the STBY/CRS display window, with the dual selector knob, set the frequency of a station that transmits.
Start this frequency. To do this, push the transfer pushbutton switch (double arrow) between the two display windows.	The frequency set comes into view in the active display window.
2.On the ACP of the station under maintenance:
Push the HF1 transmission pushbutton switch.	The green bars on the HF1 transmission pushbutton switch come on.
Push and release the HF1 reception pushbutton switch.	The reception pushbutton switch moves fully out and comes on.
Set the INT/RAD switch to RAD and release it (You can do this operation on the PTT switch of the sidestick controller at the CAPT. or F/O station).	During the tuning (which continues for approximately 5 seconds), the reception stops and you can hear a signal of 1000 Hz in the boomset.
	After the tuning, make sure that the reception in the boomset is correct.
Smoothly turn the HF1 reception pushbutton switch clockwise.	The reception you can hear must change smoothly without interference.
Set the INT/RAD switch to RAD and hold it in this position (You can do this operation on the PTT switch of the sidestick controller at the CAPT. or F/O station).	Make sure that the fan of the transceiver operates correctly.
Hold the INT/RAD switch in the RAD position and speak in the boomset microphone (At the CAPT. or F/O station, you can hold the PTT switch on the sidestick controller).	You must hear your voice in the boomset.
	Make sure that the transmission is correct.
Release the INT/RAD switch (or the PTT switch on the sidestick controller at the CAPT. or F/O station).	The INT/RAD switch comes back to the center position.

Subtask 23-11-00-710-050-I ** ON A/C NOT FOR ALL

A. Operational Test of the HF System

ACTION	RESULT
1.On the RMP1:
Set the ON/OFF selector switch to ON.	The RMP shows the last frequencies and the last function used.
Push the HF1 pushbutton switch.	The green LED on this pushbutton switch comes on. The SEL indicator light (amber LED) comes on.
In the STBY/CRS display window, with the dual selector knob, set the frequency of a station that transmits.
Start this frequency. To do this, push the transfer pushbutton switch (double arrow) between the two display windows.	The frequency set comes into view in the ACTIVE display window.
2.On the ACP of the station under maintenance:
Push the HF1 transmission pushbutton switch.	The green bars on the HF1 transmission pushbutton switch come on.
Push and release the HF1 reception pushbutton switch.	The reception pushbutton switch moves fully out and comes on.
Set the INT/RAD switch to RAD and release it (You can do this operation on the PTT switch of the sidestick controller at the CAPT. or F/O station).	During the tuning (which continues for approximately 5 seconds), the reception stops and you can hear a signal of 1000 Hz in the boomset.
	After the tuning, make sure that the reception in the boomset is correct.
Smoothly turn the HF1 reception pushbutton switch clockwise.	The reception you can hear must change smoothly without interference.
Set the INT/RAD switch to RAD and hold it in this position (You can do this operation on the PTT switch of the sidestick controller at the CAPT. or F/O station).	Make sure that the fan of the transceiver operates correctly.
Hold the INT/RAD switch in the RAD position and speak in the boomset microphone (At the CAPT. or F/O station, you can hold the PTT switch on the sidestick controller).	You must hear your voice in the boomset.
	Make sure that the transmission is correct.
Release the INT/RAD switch (or the PTT switch on the sidestick controller at the CAPT. or F/O station).	The INT/RAD switch comes back to the center position.

Subtask 23-11-00-710-050-K ** ON A/C NOT FOR ALL

A. Operational Test of the HF System

NOTE: This test is for the system 1. For the other system(s), use the indications between the parentheses.

ACTION	RESULT
1.On the RMP1:
Set the ON/OFF selector switch to ON.	The RMP shows the last frequencies and the last function used.
Push the HF1 (HF2) pushbutton switch.	The green LED on this pushbutton switch comes on. The SEL indicator light (amber LED) comes on.
In the STBY/CRS display window, with the dual selector knob, set the frequency of a station that transmits.
Start this frequency. To do this, push the transfer pushbutton switch (double arrow) between the two display windows.	The frequency set comes into view in the ACTIVE display window.
2.On the ACP of the station under maintenance:
Push the HF1 (HF2) transmission pushbutton switch.	The green bars on the HF1 (HF2) transmission pushbutton switch come on.
Push and release the HF1 (HF2) reception pushbutton switch.	The reception pushbutton switch moves fully out and comes on.
Set the INT/RAD switch to RAD and release it (You can do this operation on the PTT switch of the sidestick controller at the Capt. or F/O station).	During the tuning (which continues for approximately 5 seconds), the reception stops and you can hear a signal of 1000 Hz in the boomset.
	After the tuning, make sure that the reception in the boomset is correct.
Smoothly turn the HF1 (HF2) reception pushbutton switch clockwise.	The reception you can hear must change smoothly without interference.
Set the INT/RAD switch to RAD and hold it in this position (You can do this operation on the PTT switch of the sidestick controller at the CAPT. or F/O station).	Make sure that the fan of the transceiver operates correctly.
Hold the INT/RAD switch in the RAD position and speak in the boomset microphone (At the CAPT. or F/O station, you can hold the PTT switch on the sidestick controller).	You must hear your voice in the boomset.
	Make sure that the transmission is correct.
Release the INT/RAD switch (or the PTT switch on the sidestick controller at the CAPT. or F/O station).	The INT/RAD switch comes back to the center position.

5. Close-up
Subtask 23-11-00-860-051-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the ACP, push the HF1 transmission pushbutton switch and the HF1 reception pushbutton switch.
(2) On the RMP1, set the ON/OFF selector switch to OFF.
(3) Disconnect the boomset at all the crew stations.
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002)

Subtask 23-11-00-860-051-B ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the ACP, push the HF1 (HF2) transmission pushbutton switch and the HF1 (HF2) reception pushbutton switch.
(2) On the RMP1, set the ON/OFF selector switch to OFF.
(3) Disconnect the boomset at all the crew stations.
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002)

[Rev.10 from 2021] 2026.03.31 23:11:39 UTC