W DOC AIRBUS | AMM A320F

System Test of the Weather Radar

TASK 34-41-00-730-001-A
System Test of the Weather Radar

WARNING: OBEY THESE SAFETY PRECAUTIONS WHEN THE WEATHER RADAR IS IN OPERATION. MAKE SURE THAT:
  • ALL PERSONS ARE MORE THAN 5 METERS (16.4 FT) AWAY FROM THE ANTENNA.
  • NO PERSON IS IN THE AREA MADE BY AN ARC OF 135 DEG. ON EACH SIDE OF THE AIRCRAFT CENTERLINE.
  • THERE IS A MINIMUM SAFETY DISTANCE OF 60 METERS (200FT) BETWEEN THE ANTENNA AND ALL REFUELING OPERATIONS.
  • THERE IS A MINIMUM SAFETY DISTANCE OF 5 METERS (16.4 FT) BETWEEN THE AIRCRAFT AND ANY OBSTACLE IN THE AREA MADE BY AN ARC OF 90 DEG. ON EACH SIDE OF THE AIRCRAFT CENTERLINE.
THE AIRCRAFT MUST NOT BE IN A HANGAR OR IN A CLOSED AREA.
WARNING: MAKE SURE THAT:
  • THERE ARE NO PERSONS OR OBSTACLES IN THE RADOME AREA.
  • THE CAPT AND F/O DISPLAY SELECTOR SWITCHES ON THE WEATHER RADAR CONTROL UNIT ARE SET TO OFF (THIS PREVENTS SYSTEM EMISSIONS ON THE GROUND).
ZONE: 110
ZONE: 210
1. Reason for the Job
  • Antenna stabilization test by the ADIRU 3
  • Antenna control test
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
110
RADOME (NOSE CONE TO FR 1)
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
110AL
 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 31-32-00-860-010-A
Procedure to Get Access to the SYSTEM REPORT/TEST NAV Page
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 53-15-11-010-001-A
Opening of the Radome
TASK 53-15-11-410-001-A
Closing of the Radome
3. Job Set-up
Subtask 34-41-00-865-053-A
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
121VUCOM NAV/RADAR/15SQ1K13
** ON A/C NOT FOR ALL
121VUCOM NAV/RADAR/25SQ2K14
Subtask 34-41-00-010-050-A
B. Get Access
WARNING: MAKE SURE THAT THE CIRCUIT BREAKERS RELATED TO THE WEATHER RADAR ARE OPENED, SAFETIED AND TAGGED.
   (1) In the cockpit, put a WARNING NOTICE(S) on the center pedestal to tell persons not to operate the weather radar.
   (2) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position in zone 110 below the radome.
   (3) Open the radome 110AL (Ref. AMM TASK 53-15-11-010-001).
NOTE: Two persons are necessary to open the radome.
   (4) Make sure that the retaining arms of the radome lock correctly.
Subtask 34-41-00-860-050-F ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (EFIS only) (Ref. AMM TASK 31-60-00-860-001).
   (3) On the overhead panel, on the ADIRS CDU, set the OFF/NAV/ATT selector switches of ADIRU1 and ADIRU3 to NAV to get the ND display.
   (4) On panel 8VU, make sure that the ATT HDG selector switch is set to NORM.
   (5) On the FCU, on the CAPT and F/O EFIS control sections, set the mode selector switches to ROSE NAV or ARC.
   (6) On the center pedestal, on the radar control unit, set:
  • The ON/OFF selector switch to OFF
  • The GAIN potentiometer to CAL
  • The TILT selector switch to the 0-degree position
  • The MODE selector switch to WX
  • The GNR CLTR SPRS switch to OFF.
Subtask 34-41-00-860-050-N ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (EFIS only) (Ref. AMM TASK 31-60-00-860-001).
   (3) On the overhead panel, on the ADIRS CDU, set the OFF/NAV/ATT selector switches of ADIRU1 and ADIRU3 to NAV to get the ND display.
   (4) On panel 8VU, make sure that the ATT HDG selector switch is set to NORM.
   (5) On the FCU, on the CAPT and F/O EFIS control sections, set the mode selector switches to ROSE NAV or ARC.
   (6) On the center pedestal, on the radar control unit, set:
  • The SYS 1/OFF/2 selector switch to OFF
  • The GAIN potentiometer to AUTO
  • The TILT selector switch to the 0-degree position
  • The MODE selector switch to WX
  • The PWS AUTO/OFF switch to OFF
  • The TILT MAN/AUTO switch to MAN.
Subtask 34-41-00-860-050-X ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (EFIS only) (Ref. AMM TASK 31-60-00-860-001).
   (3) On the overhead panel, on ADIRS MSU panel 41VU, set the OFF/NAV/ATT selector switches to NAV to get the ND display.
   (4) On switching panel 8VU, make sure that the ATT HDG selector switch is set to NORM.
   (5) On the FCU, on the CAPT and F/O EFIS control sections, set the mode selector switches to ROSE NAV or ARC.
   (6) On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to OFF.
  • Set the GAIN potentiometer to CAL.
  • Set the TILT selector switch to 0°.
  • Set the MODE selector switch to WX.
  • Set the GCS switch to AUTO.
  • Set the MULTISCAN MAN/AUTO switch to MAN.
  • Set the PWS OFF/AUTO switch to OFF.
Subtask 34-41-00-860-050-Z ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (EFIS only) (Ref. AMM TASK 31-60-00-860-001).
   (3) On the overhead panel, on ADIRS MSU panel 41VU, set the OFF/NAV/ATT selector switches of ADIRU1, ADIRU2 and ADIRU3 to NAV to get the ND display.
   (4) On panel 8VU, make sure that the ATT HDG selector switch is set to NORM.
   (5) On the FCU, on the CAPT and F/O EFIS control sections, set the mode selector switches to ROSE NAV or ARC.
   (6) On the center pedestal, on the radar control unit, set:
  • The SYS 1/OFF/2 selector switch to OFF
  • The GAIN potentiometer to CAL
  • The TILT selector switch to the 0-degree position
  • The PWS AUTO/OFF switch to OFF.
Subtask 34-41-00-860-050-AU ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (EFIS only) (Ref. AMM TASK 31-60-00-860-001).
   (3) On the overhead panel, on ADIRS MSU panel 41VU, set the OFF/NAV/ATT selector switches of ADIRU1 and ADIRU3 to NAV to get the ND display.
   (4) On panel 8VU, make sure that the ATT HDG selector switch is set to NORM.
   (5) On the FCU, on the CAPT and F/O EFIS control sections, set the mode selector switches to ROSE NAV or ARC.
   (6) On the center pedestal, on the radar control unit, set:
  • The WXR/PWS control switch to OFF
  • The CAPT DISPLAY selector switch to OFF
  • The F/O DISPLAY selector switch to OFF
  • The GAIN potentiometer to AUTO.
Subtask 34-41-00-860-050-AW ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the Electronic Instrument System (EIS) start procedure (EFIS only) (Ref. AMM TASK 31-60-00-860-001).
   (3) On the overhead panel, on ADIRS MSU panel 41VU, set the OFF/NAV/ATT selector switches of ADIRU1 and ADIRU3 to NAV to get the ND display.
   (4) On panel 8VU, make sure that the ATT HDG selector switch is set to NORM.
   (5) On the FCU, on the CAPT and F/O EFIS control sections, set the mode selector switches to ROSE NAV or ARC.
   (6) On the center pedestal, on the radar control unit, set:
  • The SYS 1/OFF/2 selector switch to OFF
  • The GAIN potentiometer to CAL
  • The TILT selector switch to the 0-degree position
  • The PWS AUTO/OFF switch to OFF.
Subtask 34-41-00-865-054-A
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
121VUCOM NAV/RADAR/15SQ1K13
** ON A/C NOT FOR ALL
121VUCOM NAV/RADAR/25SQ2K14
4. Procedure
Subtask 34-41-00-730-050-A ** ON A/C NOT FOR ALL
A. Antenna Stabilization Test by the ADIRU 3
ACTION
RESULT
1.On the center pedestal, on the radar control unit :

  • Set the ON/OFF selector switch to ON.
The CAPT and F/O NDs show the radar display.
2.On the panel 8VU :

  • Set the ATT HDG selector switch to CAPT 3.
On the CAPT and F/O NDs, the radar display stays in view.
3.On the ADIRS CDU :

  • Set the OFF/NAV/ATT selector switch of the ADIRU 1 to OFF.
On the CAPT and F/O NDs, the radar display stays in view.
4.On the ADIRS CDU :
  • Set the OFF/NAV/ATT selector switch of the ADIRU 3 to OFF.
On the CAPT and F/O NDs :
  • After some seconds, the WXR ATT warning indication is shown on the right.
  • The radar display stays in view.
5.On the center pedestal, on the radar control unit :
  • Set the ON/OFF selector switch to OFF.
On the CAPT and F/O NDs :
  • After some seconds, the radar display and the WXR ATT warning indication go out of view.
Subtask 34-41-00-730-050-B ** ON A/C NOT FOR ALL
A. Antenna Stabilization Test by the ADIRU 3
ACTION
RESULT
1.On the center pedestal, on the radar control unit:

  • Set the 1/OFF/2 system selector switch to 1 (2).
The CAPT and F/O NDs show the radar display.
2.On the panel 8VU:

  • Set the ATT HDG selector switch to CAPT 3 (F/O 3).
On the CAPT and F/O NDs, the radar display stays in view.
3.On the ADIRS CDU:

  • Set the OFF/NAV/ATT selector switch of the ADIRU 1 (ADIRU 2) to OFF.
On the CAPT and F/O NDs, the radar display stays in view.
4.On the ADIRS CDU:
  • Set the OFF/NAV/ATT selector switch of the ADIRU 3 to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the WXR ATT warning indication is shown on the right.
  • The radar display stays in view.
5.On the center pedestal, on the radar control unit:
  • Set the 1/OFF/2 system selector switch to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the radar display and the WXR ATT warning indication go out of view.
Subtask 34-41-00-730-050-F ** ON A/C NOT FOR ALL
A. Antenna Stabilization Test by the ADIRU 3
ACTION
RESULT
1.On the center pedestal, on the radar control unit:

  • Set the 1/OFF/2 system selector switch to 1 (2).
The CAPT and F/O NDs show the radar display.
2.On panel 8VU:

  • Set the ATT HDG selector switch to CAPT 3 (F/O 3).
On the CAPT and F/O NDs, the radar display stays in view.
3.On ADIRS MSU panel 41VU:

  • Set the OFF/NAV/ATT selector switch of ADIRU 1 (ADIRU 2) to OFF.
On the CAPT and F/O NDs, the radar display stays in view.
4.On ADIRS MSU panel 41VU:
  • Set the OFF/NAV/ATT selector switch of ADIRU 3 to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the WXR ATT warning indication is shown on the right.
  • The radar display stays in view.
5.On the center pedestal, on the radar control unit:
  • Set the 1/OFF/2 system selector switch to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the radar display and the WXR ATT warning indication go out of view.
Subtask 34-41-00-730-050-H ** ON A/C NOT FOR ALL
A. Antenna Stabilization Test by the ADIRU 3
ACTION
RESULT
1.On the center pedestal, on the radar control unit:

  • Set the CAPT and F/O DISPLAY switches to ALL.

2.On the center pedestal, on the radar control unit:

  • Set the WXR/PWS control switch to 1 (or 2).
The CAPT and F/O NDs show the radar display.
3.On panel 8VU:

  • Set the ATT HDG selector switch to CAPT 3 (F/O 3).
On the CAPT and F/O NDs, the radar display stays in view.
4.On ADIRS MSU panel 41VU:

  • Set the OFF/NAV/ATT selector switch of ADIRU 1 (ADIRU 2) to OFF.
On the CAPT and F/O NDs, the radar display stays in view.
5.On ADIRS MSU panel 41VU:
  • Set the OFF/NAV/ATT selector switch of ADIRU 3 to OFF.
On the CAPT and F/O NDs:
  • The red WXR R/T warning indication comes into view (It is possible that the amber WXR ATT warning indication comes into view first for a few seconds).
  • The radar display goes out of view.
6.On the center pedestal, on the radar control unit:
  • Set the WXR/PWS control switch to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the WXR R/T warning indication goes out of view.
Subtask 34-41-00-730-050-O ** ON A/C NOT FOR ALL
A. Antenna Stabilization Test by the ADIRU 3
ACTION
RESULT
1.On the center pedestal, on the radar control unit:

  • Set the SYS 1/OFF/2 selector switch to 1 (2).
The CAPT and F/O NDs show the radar display.
2.On switching panel 8VU:

  • Set the ATT HDG selector switch to CAPT 3 (F/O 3).
On the CAPT and F/O NDs, the radar display stays in view.
3.On ADIRS MSU panel 41VU:

  • Set the OFF/NAV/ATT selector switch of ADIRU 1 (ADIRU 2) to OFF.
On the CAPT and F/O NDs, the radar display stays in view.
4.On ADIRS MSU panel 41VU:
  • Set the OFF/NAV/ATT selector switch of the ADIRU 3 to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the WXR ATT warning indication is shown on the right.
  • The radar display stays in view.
5.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the radar display and the WXR ATT warning indication go out of view.
Subtask 34-41-00-730-051-D ** ON A/C NOT FOR ALL
B. Antenna Control Test
ACTION
RESULT
1.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to 1(2).

2.On one MCDU:

  • Push the line key adjacent to the RADAR 1 (RADAR 2) indication.
  • Push the line key adjacent to the TEST indication.
During the test sequence, make sure that the antenna:
  • Turns in elevation (+ 15°, - 15°)
  • Turns in azimuth from the right side to the left side, then becomes stable at 0°, vertical to the aircraft centerline.

At the end of the test, on the MCDU, the TEST OK indication comes into view.
On the CAPT and F/O NDs, ignore the radar indications.
  • Push the line key adjacent to the RETURN indication.
The antenna stops.
On the MCDU:
  • The MCDU MENU page comes into view.
3.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to OFF.

Subtask 34-41-00-730-051-I ** ON A/C NOT FOR ALL
B. Antenna Control Test
ACTION
RESULT
1.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to 1(2).
2.On one MCDU:

  • Push the line key adjacent to the RADAR 1 indication.
  • Push the line key adjacent to the TEST indication.
During the test sequence, make sure that the antenna:
  • Turns in elevation (+ 15°, - 15°)
  • Turns in azimuth from the right side to the left side, then becomes stable at 0°, vertical to the aircraft centerline.
    At the end of the test, on the MCDU, the TEST OK indication comes into view.
    On the CAPT and F/O NDs, ignore the radar indications.
  • Push the line key adjacent to the RETURN indication.
On the MCDU:
  • The MCDU MENU page comes into view.
3.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to OFF.
Subtask 34-41-00-730-051-J ** ON A/C NOT FOR ALL
B. Antenna Control Test
ACTION
RESULT
1.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to 1(2).
The CAPT and F/O NDs show the radar display.
2.On one MCDU:

  • Push the line key adjacent to the RADAR 1 indication.
  • Push the line key adjacent to the TEST indication.
During the test sequence, make sure that the antenna:
  • Turns in elevation (+10°, -10°)
  • Turns in azimuth (+15°, -15°), then does a scan continuously (-90°, +90°) until the end of the test.
    At the end of the test, on the MCDU, the TEST OK indication comes into view.
    On the CAPT and F/O NDs, ignore the radar indications.
  • Push the line key adjacent to the RETURN indication.
The antenna stops.
On the MCDU:
  • The MCDU MENU page comes into view.
3.On the center pedestal, on the radar control unit:
  • Set the SYS 1/OFF/2 selector switch to OFF.

Subtask 34-41-00-730-051-K ** ON A/C NOT FOR ALL
B. Antenna Control Test
ACTION
RESULT
1.On the center pedestal, on the radar control unit:
  • Set CAPT and F/O DISPLAY switches to ALL.

2.On the center pedestal, on the radar control unit:
  • Set the WXR/PWS control switch to 1(2).
The CAPT and F/O NDs show the radar display.
3.On one MCDU:

  • Push the line key adjacent to the RADAR 1 (RADAR 2) indication.
  • Push the line key adjacent to the TEST indication.
During the test sequence, make sure that the antenna:
  • Turns in elevation (+10°, -10°)
  • Turns in azimuth (+15°, -15°), then does a scan continuously (-90°, +90°) until the end of the test.
    At the end of the test, on the MCDU, the TEST OK indication comes into view.
    On the CAPT and F/O NDs, ignore the radar indications.
  • Push the line key adjacent to the RETURN indication.
The antenna stops.
On the MCDU:
  • The MCDU MENU page comes into view.
4.On the center pedestal, on the radar control unit:
  • Set the WXR/PWS control switch to OFF.
On the CAPT and F/O NDs:
  • After some seconds, the WXR R/T warning indication goes out of view.
5. Close-up
Subtask 34-41-00-860-051-A
A. Put the aircraft back to its initial configuration.
   (1) On the panels 301VU and 500VU, set the PFD and ND potentiometers to OFF.
   (2) On the panel 8VU, set the ATT HDG selector switch to NORM.
   (3) Make sure that the work area is clean and clear of tools and other items.
   (4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 34-41-00-410-050-A
B. Close Access
   (1) Close the radome 110AL (Ref. AMM TASK 53-15-11-410-001).
NOTE: Make sure that the radome locks correctly.
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 04:03:37 UTC
"Aviabrain" 2025