BITE Test of the High Frequency (HF) System

TASK 23-11-00-740-001-A
BITE 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.

ZONE: 210

1. Reason for the Job
To make sure that the HF system operates correctly.
2. Job Set-up Information
A. Work Zones and Access Panels

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

B. 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 31-32-00-860-003-A	Procedure to Get Access to the SYSTEM REPORT/TEST/COM Page

3. Job Set-up
Subtask 23-11-00-860-054-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) Make sure that the annunciator lights on the front panel of the transceivers do not come on.
(3) On all RMPs, set the ON/OFF selector switch to ON.
(4) On one Multipurpose Control & Display Unit (MCDU), get access to the "SYSTEM REPORT/TEST COM" page (Ref. AMM TASK 31-32-00-860-003).

Subtask 23-11-00-860-054-F ** ON A/C NOT FOR ALL

Subtask 23-11-00-865-068-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	COM/RMP/1	2RG1	G10
** ON A/C NOT FOR ALL
49VU	HF1	1RE1	HA14
** ON A/C ALL
121VU	COM NAV/RMP/2	2RG2	L02
** ON A/C NOT FOR ALL
121VU	COM NAV/RMP/3	2RG3	L03
** ON A/C NOT FOR ALL
121VU	COM NAV/HF2	1RE2	L13

Subtask 23-11-00-875-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	COM/RMP/1	2RG1	G10
** ON A/C NOT FOR ALL
49VU	HF1	1RE1	HA14
** ON A/C ALL
121VU	COM NAV/RMP/2	2RG2	L02
** ON A/C NOT FOR ALL
121VU	COM NAV/RMP/3	2RG3	L03
** ON A/C NOT FOR ALL
121VU	COM NAV/HF2	1RE2	L13

4. Procedure
Subtask 23-11-00-740-050-A ** ON A/C NOT FOR ALL

A. BITE Test of the HF System

ACTION	RESULT
1.On the MCDU, on the COM menu page: Push the line key adjacent to the HF1 indication.	On the MCDU: The HF-1 page comes into view.
2.On the HF-1 page:
Push the line key adjacent to the TEST indication.	The HF-1 TEST page comes into view.
3.On the HF-1 TEST page: Push the line selection key adjacent to the START TEST.	On the HF-1 TEST page: TEST IN PROGRESS indication comes into view. TEST OK indication comes into view.
4.On the MCDU keyboard: Push the MCDU MENU mode key.	The MCDU MENU page comes into view.

Subtask 23-11-00-740-050-E ** ON A/C NOT FOR ALL

A. BITE 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 MCDU, on the COM menu page: Push the line key adjacent to the HF1(HF2) indication.	On the MCDU: The HF-1(2) page comes into view.
2.On the HF-1(2) page:
Push the line key adjacent to the TEST indication.	The HF-1(2) TEST page comes into view.
3.On the HF-1(2) TEST page: Push the line selection key adjacent to the START TEST.	On the HF-1(2) TEST page: TEST IN PROGRESS indication comes into view. TEST OK indication comes into view.
4.On the MCDU keyboard: Push the MCDU MENU mode key.	The MCDU MENU page comes into view.

5. Close-up
Subtask 23-11-00-862-051-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On all RMPs, set the ON/OFF selector switch to OFF.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:49:53 UTC