W DOC AIRBUS | AMM A320F

Installation of the Marker Antenna

TASK 34-55-18-400-001-A
Installation of the Marker Antenna

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 130
ZONE: 133
FIN: 1RS
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Consumable Materials
REFERENCE
DESIGNATION
(Material No.04QAB2)
Coating_- Flexible Structure
(Material No.04TMB2)
Varnish-- Electrical Bonding Structure
(Material No.06AAB1)
Polysulfide Sealant-General Purpose Fillet -
(Material No.06ABF1)
Polysulfide Sealant-Fuel Tank Quick Curing -
(Material No.06AEB2)
Polysulfide Sealant-Low Adhesion Fillet Structure
(Material No.08BAA9)
Non Aqueous Cleaner-General - -
(Material No.14DBB1)
Release Agent-- Liquid Wax -
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
130
FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
133
BAY UNDER FWD CAR COMPT FLOOR
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
6
SEAL
AIPC 34-55-18-01-010
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 34-55-00-720-001-A
Functional Test of the VOR/MKR
F Marker Antenna ** ON A/C NOT FOR ALL
F Marker Antenna ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 34-55-18-865-051-A
A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUNAV/VOR/12RS1G13
4. Procedure
Subtask 34-55-18-914-053-A
CAUTION: AFTER THREE DAYS OF FLIGHT WITHOUT SEALANT, DO THE FULL INSTALLATION OF THE ANTENNA:
  • REMOVE THE ANTENNA
  • CLEAN THE FUSELAGE AND ANTENNA SURFACES AND REMOVE ALL SIGNS OF HUMIDITY.
IF YOU DO NOT DO THIS, WATER CAN GO INTO THE STRUCTURE AND CORROSION CAN OCCUR.
CAUTION: AFTER TEN DAYS OF FLIGHT WITH INTERPOSITION SEALANT OR A GEL/ SILICON GASKET, DO THESE STEPS:
  • CLEAN THE AREA AROUND THE ANTENNA, AND
  • APPLY A SEALANT BEAD AROUND THE ANTENNA AND/OR SEALANT ON THE HEADS OF THE SCREWS.
IF YOU DO NOT DO THIS, WATER CAN GO INTO THE STRUCTURE AND CORROSION CAN OCCUR.
A. Aircraft Antenna Sealant-Exemption
Obey the indications given in the table that follows if it is not possible to:
  • Apply the sealant.
  • Let the sealant cure during the applicable curing time.

This table gives the time limits that are applicable for the sealant installation on the marker antenna.
These limits are adapted to:
  • The antenna installation configuration
  • The antenna location
  • The sensitive condition of the antenna to water infiltration
  • The available condition of the sealant.
Configuration of the antenna installation
If the airline has sealant but cannot wait until the sealant is cured
If the airline has no sealant available
Sealant between the antenna and the fuselage (interposition sealant):
  • Sealing bead around the antenna
  • Sealant on the heads of the screws
  • O-ring at the antenna connector level.
  • It is permitted to fly for a maximum of ten days without the sealing bead around the antenna if the interposition sealant is applied and the O-ring is installed.
  • It is permitted to fly for a maximum of ten days without the sealant on the heads of the screws.
  • It is permitted to fly for a maximum of three days without the sealant (interposition sealant, sealing bead and sealant on the heads of the screws) if the O-ring is installed.
NOTE: When there is no sealing bead, there is a risk of aerodynamic noise.
Subtask 34-55-18-420-050-A
B. Installation of the Marker Antenna
WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
  • FLUSH IT AWAY WITH CLEAN WATER
  • GET MEDICAL AID.
   (1) Remove the sealant from the fuselage with the Non Aqueous Cleaner-General - - (Material No.08BAA9) .
     (a) If you install the same antenna, clean it with the Non Aqueous Cleaner-General - - (Material No.08BAA9) .
   (2) Apply the Release Agent-- Liquid Wax - (Material No.14DBB1) on the antenna (3) mount and on the fuselage (2).
   (3) Apply the Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) on the antenna (3) mount and on the fuselage (2).
     (a) Make sure that there is no sealant in the screw holes.
   (4) Remove the blanking caps from the coaxial connectors (1) and (5).
   (5) Install the new AIPC 34-55-18-01-010 SEAL (6).
   (6) Connect the coaxial connector (1) to the antenna connector (5).
   (7) Put the antenna (3) in position on the fuselage (2).
   (8) Attach the antenna (3) with the screws (4).
   (9) Remove the unwanted sealant.
   (10) Apply a sealing bead with the Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) or, as an alternative, the Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) , around the antenna (3).
   (11) Apply the Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) or, as an alternative, the Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) , on the heads of the screws (4).
   (12) Make the contour of the sealant on the screws (4) and around the antenna (3) smooth.
   (13) Apply the Coating_- Flexible Structure (Material No.04QAB2) on the sealant around the bottom of the antenna (3).
NOTE: It is not mandatory to paint the sealant that is around the bottom of the antenna and on the heads of the screws.
   (14) Apply the Varnish-- Electrical Bonding Structure (Material No.04TMB2) on the sealant on the heads of the screws (4).
Subtask 34-55-18-865-052-A
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUNAV/VOR/12RS1G13
Subtask 34-55-18-720-050-A
D. Do the functional test of the VOR/MKR (para. MKR Identification and Reception test) (Ref. AMM TASK 34-55-00-720-001).
5. Close-up
Subtask 34-55-18-860-050-A
A. Make sure that the work area is clean and clear of tools and other items.
[Rev.10 from 2021] 2026.04.01 04:06:20 UTC
"Aviabrain" 2025