Removal of the ATC Antenna

TASK 34-52-11-000-001-A
Removal of the ATC Antenna

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 127
ZONE: 128
ZONE: 223
ZONE: 224
ZONE: 233
ZONE: 234
FIN: 7SH1
FIN: 7SH2 ** ON A/C NOT FOR ALL
FIN: 7SH3
FIN: 7SH4 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	SCRAPER - NON METALLIC
FOR [7SH3] (ANTENNA-ATC TOP, 1)
No specific	AR	ACCESS PLATFORM 6M (20 FT)
FOR [7SH3] (ANTENNA-ATC TOP, 1)
FOR [7SH4] (ANTENNA-ATC TOP, 2)
No specific	AR	ACCESS PLATFORM 6M (20 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
128	REAR AVIONIC COMPARTMENT
223	FWD CAB OVERHEAD COMPARTMENT
224	FWD CAB OVERHEAD COMPARTMENT
233	FWD PASSENGER COMPT OVERHEAD COMPARTMENT
234	FWD PASSENGER COMPT OVERHEAD COMPARTMENT

C. Referenced Information

REFERENCE	DESIGNATION
ATC Antenna ** ON A/C NOT FOR ALL
ATC Antenna ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 34-52-11-865-050-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 7SH3 (ANTENNAATC TOP, 1) FOR FIN: 7SH1 (ANTENNAATC BOTTOM, 1)
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
FOR FIN: 7SH4 (ANTENNAATC TOP, 2) FOR FIN: 7SH2 (ANTENNAATC BOTTOM, 2)
121VU	COM NAV/ATC/2	5SH2	K07

Subtask 34-52-11-010-050-B ** ON A/C NOT FOR ALL

B. Get Access
(1) FOR [7SH1] (ANTENNA-ATC BOTTOM, 1), [7SH2] (ANTENNA-ATC BOTTOM, 2)
(a) Find Air Traffic Control (ATC) bottom antenna 1 (7SH1) at zone 127.
(b) Find ATC bottom-antenna 2 (7SH2) at zone 128.
(2) FOR [7SH3] (ANTENNA-ATC TOP, 1), [7SH4] (ANTENNA-ATC TOP, 2)
(a) Put the ACCESS PLATFORM 6M (20 FT) in position at zone 234 for ATC top-antenna 1 (7SH3), or/and
(b) Put the ACCESS PLATFORM 6M (20 FT) in position at zone 233 for ATC top-antenna 2 (7SH4).

Subtask 34-52-11-010-050-D ** ON A/C NOT FOR ALL

B. Get Access
(1) FOR [7SH1] (ANTENNA-ATC BOTTOM, 1)
Find Air Traffic Control (ATC) antenna 7SH1 at zone 127.
(2) FOR [7SH3] (ANTENNA-ATC TOP, 1)
Put the ACCESS PLATFORM 6M (20 FT) in position at zone 234.

4. Procedure
Subtask 34-52-11-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the ATC Antenna

NOTE: The procedure is the same for the ATC antennas 7SH1, 7SH2, 7SH3 and 7SH4.

(1) Remove the sealant from the heads of the screws (5) with the SCRAPER - NON METALLIC.
(2) Remove the screws (5).
(3) Pull the antenna (4) away from the fuselage (1).
(4) Disconnect the coaxial connector (2) from the ATC antenna connector (3).
(5) Remove the antenna (4).
(6) Put CAP - BLANKING on the disconnected coaxial connectors (2) and (3).
(7) Remove and discard the O-ring seal (6).

Subtask 34-52-11-020-050-C ** ON A/C NOT FOR ALL

A. Removal of the ATC Antenna

NOTE: The procedure is the same for ATC antennas 7SH1 and 7SH3.

[Rev.10 from 2021] 2026.04.01 01:02:46 UTC