User's Manual

SBS-900 Shore Based Radar Systems
Chapter 10: Corrective maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 135 of 240
10.5 Standard S-band
10.5.1Antenna
The corrective maintenance for the standard
LPA-A3 and LPA-A3-BAAA Low Profile Antennas
is restricted to cleaning and inspecting for
damage.
See Planned Maintenance/ Annual Maintenance
for cleaning and inspection details.
Standard GTX-A11 fitted with an LPA-A3
10.5.2 Gearbox
The GTX-A11 and GTX-A11-BAAA gearbox housing is a cast enclosure
with a service cover that allows access to the azimuth/ heading line (ACP/
ARP) encoder and it connections and the S-band flexwell connection.
There are no other electronic assemblies within the gearbox casing.
The gearbox comprises of the following sub-assemblies:
10.5.3Spares listing
X Band system description
Part number
Casing colour
Signal white
Casing colour
Silver Grey
Complete assembly GTX-A11 GTX-A11-BAAA
Antenna motor / gearbox assembly TBC TBC
Motor coupling gasket TBC TBC
RF rotary Joint
Rotating joint gasket
TBC TBC
Service access door seal 55-100-0311-001
Azimuth/ heading line quadrature encoder TBC
Door seal 55-100-0311-001