3. Job Set-up
__________ Subtask 23-12-11-865-050
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
FOR 4RC1
49VU COM/VHF/1
FOR 4RC2
121VU COM NAV/VHF/2
Subtask 23-12-11-010-050
B. Get Access
R (1) Get access to the VHF Antennas: R FOR 4RC1
2RC1 G09
2RC2 L04
R put the ACCESS PLATFORM 6M (20 FT) in position at Zone 220.
R FOR 4RC2
R find the VHF antenna 4RC2 at Zone 154.
R
4. Procedure
_________
R
(Ref. Fig. 401/TASK 23-12-11-991-001) R
Subtask 23-12-11-020-050
R
R A. Removal of the VHF Antenna 4RC1 R
R (1) Remove the sealant from the heads of the screws (2) with a SCRAPER -R NON METALLIC.
R (2) Remove the sealant from the antenna base (1) and the fuselage R structure with a SCRAPER - NON METALLIC.
R (3) Remove the screws (2) from the antenna (1).
1EFF : ALL 1 23-12-11Page 402 1 1 Feb 01/05 1 1 1CES 1
R VHF Antennas Figure 401/TASK 23-12-11-991-001
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R (4) Lift the antenna (1) until you can see the coaxial cable connector
R (3)
R (5) Disconnect the coaxial cable connector (3) from the antenna connector
R (4).
R (6) Safety the coaxial cable (5). Put masking tape BONDING AND ADHESIVE
R COMPOUNDS (Material No. 08-074) around the coaxial cable (5) and
R attach it to the fuselage.
R (7) Put blanking caps on the disconnected electrical connectors.
R (8) Remove and discard the O-ring (6) from the antenna (1).
R Subtask 23-12-11-020-054
R B. Removal of the VHF Antenna 4RC2
R (1) Remove the sealant from the heads of the screws (2) and (7) with a
R SCRAPER - NON METALLIC.
R (2) Remove the sealant from the antenna base (8) and the fuselage
R structure with a SCRAPER - NON METALLIC.
R (3) Remove the screws (2) and (7) from the antenna (8).
R (4) Lift the antenna (8) until you can see the coaxial cable connector
R (3)
R (5) Disconnect the coaxial cable connector (3) from the antenna connector
R (4).
R (6) Safety the coaxial cable (5). Put masking tape BONDING AND ADHESIVE
R COMPOUNDS (Material No. 08-074) around the coaxial cable (5) and
R attach it to the fuselage.
R (7) Put blanking caps on the disconnected electrical connectors.
R (8) Remove and discard the O-ring (6) from the antenna (8).
R 1EFF : ALL 1 23-12-11Page 404 1 1 Feb 01/05 1 1 1CES 1 TASK 23-12-11-400-001
Installation of the VHF Antennas (4RC1) and (4RC2)
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
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-013A C Z-24.223
RELEASE AGENT (Ref. 20-31-00) Material No. 08-074
MASKING TAPE (Ref. 20-31-00) Material No. 09-016 USA MIL-PRF-81733D TYPE II CLASS B
CORROSION INHIBITING FILLET CONSISTENCY
(Ref. 20-31-00) Material No. 09-019 USA AMS 3267/3
LOW ADHESION CORROSION INHIBITING SEALANT
(Ref. 20-31-00) Material No. 11-003 USA ASTM D 740
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