D.  Access
 (1)  Location Zones 107 Top of Fuselage, Center 209 Bottom of Fuselage, Forward 219 Bottom of Fuselage, Aft (AIRPLANES WITH VHF-3 ANTENNA)
 E.  Procedure
 S 864-001
 (1)  Open the applicable circuit breaker that follows and attach a DO-NOT-CLOSE tag:
 (a)  
P6-1 Circuit Breaker Panel
 1) VHF-2

 (b)  
P18-2 Circuit Breaker Panel
 1) VHF-1
 2) VHF-3 (if installed)

 S 024-002
 (2)  Do these steps to remove the VHF communication antenna:
 (a)  
Remove the 10 screws that attach the antenna to the airplane.

 (b)  
While you hold the antenna, break the seal with the sealant removal tool.

 CAUTION:_______BE CAREFUL WITH THE SEALANT REMOVAL TOOL. YOU CAN CAUSE DAMAGE TO THE AIRPLANE SKIN OR THE ELECTRICAL CABLE.
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A 737-300/400/500MAINTENANCE MANUAL

MOUNTING SCREW (10 LOCATIONS)
VHF ANTENNAS
VHF Antenna Installation
Figure 401

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A13039
A
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 (c)  
Pull the antenna away from the airplane until you have access to the connector on the coaxial cable.

 (d)  
Disconnect the coaxial cable and remove the antenna.

 NOTE: For the top antenna, the cable can fall through the
____ hole. Make sure you attach the cable to something to prevent this.
 S 114-003
 (3)  Clean the airplane surface (AMM 20-10-34/701):
 (a)  
Remove the used sealant from the airplane surface.

 (b)  
Rub the airplane surface with the solvent and a clean rag.

 TASK 23-21-11-404-019
 3. VHF Communication Antenna Installation
_______________________________________
 A. Consumable Materials
 (1)  
A00247 Sealant - chromate, Type BMS 5-95, Class B

 (2)  
G00009 Corrosion Inhibiting Compound BMS3-23

 B. References
 (1)  
SWPM 20-20-00, Standard Wiring Practices Manual

 (2)  
AMM 23-21-00/501, VHF Communication System

 (3)  
AMM 51-31-00/201, Seals and Sealing

 C. Access
 (1)  Location Zones 107 Top of Fuselage, Center 209 Bottom of Fuselage, Forward 219 Bottom of Fuselage, Aft (airplanes with VHF-3 installed)
 D. Prepare to Install the VHF Antenna
 S 864-004
 (1) Make sure the applicable circuit breaker that follows is open:
 (a)  
P6-1 Circuit Breaker Panel
 1) VHF-2

 (b)  
P18-2 Circuit Breaker Panel
 1) VHF-1
 2) VHF-3 (if installed)

 S 164-005
 (2)  
Make sure the mating surfaces of the antenna and the airplane are clean.

 S 624-006

 (3)  
Apply corrosion inhibiting compound BMS3-23 to the mating surface.

 E. Install the VHF Antenna
 S 964-013
 (1) Replace the used O-ring on the antenna if it is necessary.
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A 737-300/400/500MAINTENANCE MANUAL
 S 414-008
 (2)  
Connect the coaxial cable to the antenna.

 S 424-009

 (3)  
Attach the antenna to the airplane with the 10 screws.
　
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