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"COM2" ---im.)b---o—ellA.
RELAIS RADIO    "RM - SWITCH"
_OFF 
      
    BUS 3  
      
      
  0    BUS 3
     •--; 
  ON
 RADIO INTERRUPTEUR GENERAL RADIO
 RELAY RADIO MASTER SWITCH
 GENERAL MASTER 

COM 2 installation - Wiring diagram
Figure 4
 
ANTENNA
MAINTENANCE PRACTICES
1. SERVICING
None
2. REMOVAL / INSTALLATION - ANTENNA (Figures 201 and 201A)
A. Tools and consumable materials
- Sealant (TB 09-903)
- Plastic scraper
- Abrasive cloth (TB 05-916C)
- Alodine (TB 13-002)
- Cleaning agent (TB 11-912)
- Clean lintfree cloth
B. Removal of the antenna
1) Make sure the switch-breaker of the main switch is open.
2) If screws (2) are sealed, remove the sealant.
3) If a sealant bead is applied around the antenna, remove the sealant with a plastic scraper.
Aircraft with overhead panel 241
4) Remove the radio loudspeaker grille.
5) Remove the radio loudspeaker to gain access to the overhead panel central attachment.
6) Remove the screw and the washer of the overhead panel central attachment.
7) Hold the overhead panel and remove the front and rear attachment screws and washers.
8) Sufficiently clear the overhead panel to gain access to connector (6).
NOTE : For the remaining operations, hold the overhead panel suspended by an appropriate means to avoid overstressing the electrical wires.
Aircraft without overhead panel 241
4) If antenna cover upholstering (8) is installed, remove screws (9), washers (10) and antenna cover upholstering (8).
5) Remove screws (11), washers (12) and antenna cover (7).
All
9) Disconnect connector (6).
10) Remove screws (2).
11) Remove antenna (1) and gasket (3).
12) If the gasket (3) removed is a bonding gasket, retain it, otherwise discard the gasket.
 
NOTE : A bonding gasket is characterized by the presence of metallic wires crossing right through the gasket.
13) Remove any sealant residues on the antenna and the fuselage.
C. Installation of the antenna
1) Make sure the switch-breaker of the master switch is open.
2) If the antenna was installed with a non-bonding gasket, perform the following operations
a) Using a soft lead pencil, draw the contour of antenna (1) on fuselage (5).
　
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