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TB20 MAINTENANCE MANUAL 23 COMMUNICATIONS TB20飞机维护手册 通讯(35)

时间:2011-10-31 12:23来源:蓝天飞行翻译 作者:航空
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A. Tools and consumable materials
- Sealant (TB 09-903)
- Plastic scraper
- Abrasive cloth (TB 05-916C)
- Cleaning agent (TB 11-912)
- Alodine (TB 13-002)
- Clean lintfree cloth
B. Removal of the antenna
1) Make sure the switch-breaker of the master 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.
4) Open baggage compartment door 219 and remove compartment bottom door 242.
5) Disconnect connector (6).
6) Remove screws (2).
7) Remove E31 antenna (1) and gasket (3).
8) 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.
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) If the antenna was installed with a non-bonding gasket, perform the following operations
a) Using a soft lead pencil, draw the contour of E31 antenna (1) on fuselage (5).
b) Strip the fuselage area in contact with E31 antenna (1), at 0.01 in (2 mm) inside the contour drawn with the soft lead pencil.
c) Clean the stripped area with a cloth moistened with cleaning agent (TB 11-912). Wipe with a dry cloth.
d) Protect the stripped area with Alodine (TB 13-002).
 
3) 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.
4) Position the retained bonding gasket (3) or a new bonding gasket - refer to the Illustrated Parts Catalog.
5) Position and secure E31 antenna (1) with screws (2).
6) Connect connector (6).
7) Make sure all the tools and materials are removed and the work area is clean and free from debris.
8) Install compartment bottom door 242 and close baggage compartment door 219.
9) Apply a bead of sealant (TB 09-903) around the antenna / fuselage junction.
• 10) Seal the heads of screws (2) with sealant (TB 09-903).
11) Perform an operational test of COM 1 system.
 
AAAA
I Validity : Option Pre-MOD. 151 Standard Post-MOD. 151
23 12 02Page 202
(BA) JUN 04
 
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  1

E31 antenna - Removal / Installation
Figure 201
 
PAGE INTENTIONALLY LEFT BLANK
 
RADIO MASTER RELAY U15 PRINTED CIRCUIT
MAINTENANCE PRACTICES
1. SERVICING None
2. REMOVAL / INSTALLATION - RADIO MASTER RELAY U15 PRINTED CIRCUIT
A. Tools and consumable materials
None
B. Removal of the radio master relay U15 printed circuit (Figure 201)
 
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