Installation of the Top Antenna

TASK 23-28-13-400-001-A
Installation of the Top Antenna

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 222
ZONE: 230
FIN: 116RV1 ** 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 6M (20 FT)
No specific	1	SCRAPER - NON METALLIC
No specific	1	TAPE - MASKING
No specific	Torque wrench: range to between 22 and 18 lbf.in (0.25 and 0.20 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06AAC1)	Polysulfide Sealant-General Purpose Interfay -
(Material No.06ABF1)	Polysulfide Sealant-Fuel Tank Quick Curing -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14DBB1)	Release Agent-- Liquid Wax -
(Material No.14QDB1)	Wire-Locking Dia: 0.5 mm (0.020 inch) CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
222	FWD CAB UTILITY AREA
230	FWD PASSENGER COMPARTMENT

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	O-RINGS	AIPC 23-28-13-21-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 23-28-00-740-001-A	BITE Test of the Satellite Communication System
TASK 23-28-13-400-003-A	Installation of the Mounting Base of the Top Antenna
TASK 51-76-11-300-001-A	Repair of the Sealing
Top Antenna

3. Job Set-up
Subtask 23-28-13-865-068-A ** ON A/C NOT FOR ALL

A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	SATCOM	102RV1	K01

Subtask 23-28-13-860-050-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 6M (20 FT) is in position at zone 230.

4. Procedure
Subtask 23-28-13-910-050-A ** ON A/C NOT FOR ALL

A. Preparation for Installation

Top Antenna ** ON A/C NOT FOR ALL

(1) Do an inspection of the component interfaces and the adjacent area.
(2) Remove the used sealant with a SCRAPER - NON METALLIC and clean the fuselage structure with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(3) Clean the component interface and/or the adjacent area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Apply TAPE - MASKING to the screw holes and the antenna connectors.

Subtask 23-28-13-420-055-C ** ON A/C NOT FOR ALL

B. Installation of the Top Antenna

Top Antenna ** ON A/C NOT FOR ALL

(1) Apply Release Agent-- Liquid Wax - (Material No.14DBB1) to the bottom of the antenna (2).
(2) Remove the TAPE - MASKING from the screw holes and the electrical connector (3).
(3) Make sure that the mounting base (6) is installed (interface between the fuselage and the antenna) (Ref. AMM TASK 23-28-13-400-003).
(4) Make sure that the three O-rings (5) are in good condition.
(5) Install the three AIPC 23-28-13-21-010 O-RINGS (5). If necessary, install new O-rings.
(6) Remove the CAP-BLANKING from each electrical connector and receptacle.
(7) Connect the electrical connector (3) and the coaxial connectors (4) to the antenna (2).

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.

(8) Safety the electrical connector (3) and the coaxial connectors (4) with 14QDB1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES Nickel Alloy -.
(9) Install the antenna (2) on the mounting base (6).
(10) Install and TORQUE the screws (1) to between 22 and 18 lbf.in (0.25 and 0.20 m.daN )

in a diagonal sequence.
(11) Make sure that the bonding contact resistance between the antenna (2) and the fuselage structure is not more than 5.0 milliohms (Ref. AMM TASK 20-28-00-912-802).

CAUTION: WHEN YOU MAKE THE SEALING BEAD AROUND THE ANTENNA, DO NOT PUT SEALANT ON THE VENT HOLES AT THE REAR OF THE ANTENNA.

(12) Make a sealing bead with Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) around the antenna (2) (Ref. AMM TASK 51-76-11-300-001).

NOTE: You can use Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) as an alternative to Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .

(13) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to all the screw heads.

Subtask 23-28-13-865-075-A ** ON A/C NOT FOR ALL

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	SATCOM	102RV1	K01

Subtask 23-28-13-740-050-A ** ON A/C NOT FOR ALL

D. Do the BITE test of the satellite communication system (Ref. AMM TASK 23-28-00-740-001).

5. Close-up
Subtask 23-28-13-410-050-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) Remove the access platform(s).

[Rev.9 from 2019] 2026.04.02 06:42:25 UTC