W DOC AIRBUS | AMM A320F

Installation of the Weather-Radar Antenna Assembly

TASK 34-41-11-400-802-A
Installation of the Weather-Radar Antenna Assembly

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING: MOVE THE RADAR ANTENNA ASSEMBLY CAREFULLY TO PREVENT INJURY TO PERSONS AND DAMAGE TO EQUIPMENT. THE RADAR ANTENNA ASSEMBLY (ANTENNA/DRIVE) WEIGHS APPROXIMATELY 15kg (33lb).
CAUTION: DO NOT USE THE LOCALIZER ANTENNA AT THE BOTTOM OF THE RADOME AS A SUPPORT.
ZONE: 110
FIN: 11SQ ** ON A/C NOT FOR ALL
FIN: 7SQ ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific
1
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.25 and 0.20 m.daN (22.12 and 17.70 lbf.in ) T
No specific
Torque wrench: range to between 3.87 and 3.22 m.daN (28.54 and 23.75 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.14QFC1)
Wire-Locking Dia: 0.8 mm CRES -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
110
RADOME (NOSE CONE TO FR 1)
110AL
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
3
O-RING
AIPC 34-41-01-02-120
3
GASKET
AIPC 34-41-11-02-010
3
O-RING
AIPC 34-41-81-02-140
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 20-28-00-912-802-A
Electrical Bonding - General Maintenance Procedure
TASK 20-28-00-912-803-A
Bonding Surface Preparation
TASK 34-41-00-730-001-A
System Test of the Weather Radar
TASK 53-15-11-010-001-A
Opening of the Radome
TASK 53-15-11-410-001-A
Closing of the Radome
F Weather-Radar Antenna Assembly ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 34-41-11-860-065-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) In the cockpit, put the WARNING NOTICE(S) on the center pedestal to tell persons not to operate the weather radar system.
   (2) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position below the radome at zone 110.
   (3) Open radome 110AL (Ref. AMM TASK 53-15-11-010-001).
Subtask 34-41-11-865-086-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUCOM NAV/RADAR/15SQ1K13
** ON A/C NOT FOR ALL
121VUCOM NAV/RADAR/25SQ2K14
4. Procedure
Subtask 34-41-11-420-074-A ** ON A/C NOT FOR ALL
A. Installation of the Weather-Radar Antenna Assembly
NOTE: Two persons are necessary for the installation of the antenna drive. One person holds the antenna drive and the other person installs all the bolts.
   (1) Do not remove the transparent plastic windows that are installed at:
  • The inlet of the antenna drive (1)
  • The interface between the antenna drive (1) and the antenna (17).
   (2) Clean the component interfaces and the adjacent area.
   (3) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
   (4) Hold the antenna drive (1) in its position.
   (5) Install the top bolts (5) and the washers (6). Make sure that they are sufficiently loose.
   (6) Lift the antenna drive (1) up to the structure (7) and engage it on the bolts (5).
   (7) Make sure that the washers (6) are between the bolts (5) and the antenna drive (1).
   (8) Install the bottom bolts (10) and the washers (9).
   (9) TORQUE the bolts (5) and (10) to between 3.87 and 3.22 m.daN (28.54 and 23.75 lbf.ft ) T.
   (10) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802):
  • Make sure that the bonding contact resistance between the antenna drive (1) and the structure (7) is not more than 5 milliohms (Ref. AMM TASK 20-28-00-912-802).
   (11) Remove the CAP - BLANKING from the electrical connectors (11) and (12), and from the flange of the wave guide (4).
   (12) Put the new AIPC 34-41-01-02-120 O-RING (3) or the new AIPC 34-41-11-02-010 GASKET (3) in the correct position on the flange of the wave guide (4).
   (13) Connect the wave guide (4) to the antenna drive (1) with the quick-disconnect clamp (8).
   (14) Connect the electrical connector (11).
Subtask 34-41-11-420-074-B ** ON A/C NOT FOR ALL
A. Installation of the Weather-Radar Antenna Assembly
NOTE: Two persons are necessary for the installation of the antenna drive. One person holds the antenna drive and the other person installs all the bolts.
   (1) Do not remove the transparent plastic windows that are installed at:
  • The inlet of the antenna drive (1)
  • The interface between the antenna drive (1) and the antenna (17).
   (2) Clean the component interfaces and the adjacent area.
   (3) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
   (4) Hold the antenna drive (1) in its position.
   (5) Install the top bolts (5) and the washers (6). Make sure that they are sufficiently loose.
   (6) Lift the antenna drive (1) up to the structure (7) and engage it on the bolts (5).
   (7) Make sure that the washers (6) are between the bolts (5) and the antenna drive (1).
   (8) Install the bottom bolts (10) and the washers (9).
   (9) TORQUE the bolts (5) and (10) to between 3.87 and 3.22 m.daN (28.54 and 23.75 lbf.ft ) T.
   (10) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802):
  • Make sure that the bonding contact resistance between the antenna drive (1) and the structure (7) is not more than 5 milliohms (Ref. AMM TASK 20-28-00-912-802).
   (11) Remove the CAP - BLANKING from the electrical connectors (11) and (12), and from the flange of the wave guide (4).
   (12) Put the new AIPC 34-41-81-02-140 O-RING (3) or the new AIPC 34-41-11-02-010 GASKET (3) in the correct position on the flange of the wave guide (4).
   (13) Connect the wave guide (4) to the antenna drive (1) with the quick-disconnect clamp (8).
   (14) Connect the electrical connector (11).
Subtask 34-41-11-420-075-A ** ON A/C NOT FOR ALL
B. Installation of the Weather Radar Antenna
NOTE: Two persons are necessary for the installation of the antenna. One person holds the antenna and the other person installs all the bolts.
NOTE: It is possible to install the antenna (17) with the antenna drive (1) installed on the aircraft.
   (1) Put the dowels (13) in the holes (18) of the antenna (17).
   (2) Engage the support (16) between the slots (15).
   (3) TORQUE the bolts (14) to between 0.25 and 0.20 m.daN (22.12 and 17.70 lbf.in ) T.
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (4) Safety the bolts (14) with the 14QFC1Wire-Locking Dia: 0.8 mm CRES -.
   (5) Make sure that the antenna (17) turns correctly in azimuth and in elevation.
Subtask 34-41-11-865-087-A ** ON A/C NOT FOR ALL
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUCOM NAV/RADAR/15SQ1K13
** ON A/C NOT FOR ALL
121VUCOM NAV/RADAR/25SQ2K14
Subtask 34-41-11-730-062-A ** ON A/C NOT FOR ALL
D. Do the system test of the weather radar (antenna control test) (Ref. AMM TASK 34-41-00-730-001).
5. Close-up
Subtask 34-41-11-410-062-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close radome 110AL (Ref. AMM TASK 53-15-11-410-001).
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 04:01:09 UTC
"Aviabrain" 2025