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6) Disconnect connector (6).
7) Remove screws (2).
8) Remove antenna (1) and gasket (3).
9) 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) Make sure bonding area (4) is clean. Clean the surface with a cloth moistened with cleaning agent (TB 11-912). Wipe with a dry cloth.
3) Position the retained bonding gasket (3) or a new bonding gasket - refer to the Illustrated Parts Catalog.
4) Position and secure antenna (1) with screws (2).
5) Connect connector (6).
6) Make sure all the tools and materials are removed and the work area is clean and free from debris.
7) Position and secure the overhead panel.
8) Apply a bead of sealant (TB 09-903) around the antenna / fuselage junction.
9) Seal the heads of screws (2) with sealant (TB 09-903).
10) Perform an operational test of COM 2 system.
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1
2
3
E32 antenna - Removal / Installation
Figure 201
COM 3 INSTALLATION
DESCRIPTION AND OPERATION
1. GENERAL (Figure 1)
The COM 3 installation allows radio transmissions necessary for air navigation.
The COM 3 installation includes :
— the A503 transceiver,
— the A504 control box,
— the E42 antenna. The COM 3 installation also uses the audio control box — refer to 23-11-00.
The transceiver is located in the baggage compartment and protected by a cover.
The transceiver is supplied by "BUS 3" bar.
2. LOCATION (Figure 2)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
A503 transceiver 1 240 219 23-14-00
A504 control box 1 251 R / 23-14-00
E42 antenna 1 220 242 23-14-02
Circuit breaker : — "UHF" 1 230 232L WM
3. OPERATION
NOTE : For equipment operation and maintenance, refer to the supplier's Maintenance Manual.
ABAB
Validity : KTR 909 23-14-00Page 1
(BE) DEC 99
COM 3 installation — Electrical schematic
Figure 1
ABAB
Validity : KTR 909 23-14-00Page 2
(BE) DEC 99
14230000AAAAWZ5000 ©
COM 3 installation — Identification and location of components
Figure 2
PAGE INTENTIONALLY LEFT BLANK
ABAB
Validity : KTR 909 23-14-00Page 4
(BE) DEC 99
E42 ANTENNA
MAINTENANCE PRACTICES
1. SERVICING None
2. REMOVAL / INSTALLATION — E42 ANTENNA (Figure 201)
A. Tools and consumable materials
— Sealant (TB 09-903)
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本文链接地址：TB20 MAINTENANCE MANUAL 23 COMMUNICATIONS TB20飞机维护手册 通讯(46)
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