R  C. Expendable Parts 
R R R  -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
R  6  O-ring (IPC)  23-12-11 01 -010 
R  D. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  20-28-00-912-005 23-12-00-710-001  Electrical Bonding of Antennas With Conductive Bolts.Operational Test of the VHF System
 3. Job Set-up__________
 Subtask 23-12-11-860-051
R  A. Aircraft Maintenance Configuration 
R R  (1) Make sure that the ACCESS PLATFORM 6M (20 FT) is in position at Zone 254.
 Subtask 23-12-11-865-054
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU COM NAV/VHF/3 2RC3 L05 

R 1EFF : ALL 1 23-12-11Page 418 1 1 Feb 01/05 1 1 1CES 1 1EFF : ALL 1 23-12-11Page 419 1 1 Feb 01/05 1 1 1CES 11EFF : ALL 1 23-12-11Page 420 1 1 Feb 01/05 1 1 1CES 1 1EFF : ALL 1 23-12-11Page 421 1 1 Feb 01/05 1 1 1CES 1 TRANSCEIVER - VHF (1RC1,1RC2,1RC3) - REMOVAL/INSTALLATION

 4. Procedure_________
 Subtask 23-12-11-910-053 
R  A. Preparation for Installation
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED. 
R R R  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. 
R R  (1) Do an inspection of the component interface and/or the adjacent area. 
R R  (2) Remove the sealant with a SCRAPER - NON METALLIC and clean the fuselage structure with the CLEANING AGENTS (Material No. 11-03).
R  (3) Clean the component interface and/or the adjacent area with the CLEANING AGENTS (Material No. 11-003) and a MISCELLANEOUS (Material No. 19-003). 
R R  (4) Apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-074) at the edge of the antenna (1), the screw holes (2) and the antenna connector (4). 
R R  (5) Apply the release agent SPECIAL MATERIALS (Material No. 05-013) to the bottom of the antenna (1). 
R R  (6) Apply the SEALANTS (Material No. 09-019) on to the area of the fuselage that interfaces with the antenna (1).

 Subtask 23-12-11-420-052 
R  B. Installation of the VHF Antenna
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED. 
R R R  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 blanking caps from the coaxial cable connector (3) and from the antenna connector (4). 
R R R R  (2) Remove the masking tape from: - The coaxial cable (5) - The screw holes (2) - The hole for the antenna connector (4).
 (3) Make sure that the electrical connectors are clean and in the correct condition. 
R R  (4) Put the new O-ring (6) in its correct position, on the base of the antenna (1). 
R R  (5) Connect the coaxial cable connector (3) to the VHF antenna connector (4). 
R R  (6) Install the antenna (1) with the screws (2) at the fuselage structure. 
R  (7) Tighten the screws (2) diagonally. 
R R  NOTE : The antenna mounting screws (2) give the electrical bonding____ between the antenna (1) and the fuselage structure. 
R R R R (8) Make sure that the bonding resistance between the antenna (1) and the fuselage structure is not more than 5 milliohms (Ref. TASK 20-28-00-912-005). 

R  (9) Remove the unwanted sealant with a SCRAPER - NON METALLIC. 
R R  (10) Clean the area with the CLEANING AGENTS (Material No. 11-003) and a lint-free cotton cloth MISCELLANEOUS (Material No. 19-003). 
R  (11) Remove the masking tape from the base of the antenna (1). 
　
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