03-TM-0037 REV B Page 5 of 24
SECTION I
GENERAL INFORMATION
1.1. INTRODUCTION.
1.1.1. GENERAL. This manual contains the de-
scription, theory, installation and maintenance for the
DK100/DK120/DK130/DK140 Underwater Acoustic
Beacon, hereafter referred to as the “DK Series”, manu-
factured by Dukane Seacom, Inc., 7135 16th Street East,
Suite 101, Sarasota, FL 34243. These beacons have been
tested to, and meet, or exceed, all requirements of FAA
TSO-C121.
Figure 1. DK Series Underwater
Acoustic Beacon Installed in
Mounting Kits
CAUTION
THIS MANUAL PROVIDES THE NEC-
ESSARY INFORMATION TO PERFORM
THE REPAIR IN AN INTERMEDIATE
LEVEL MAINTENANCE SHOP (I-
LEVEL).
THE 3RD LEVEL OF MAINTENANCE
SHOP (D-LEVEL) IS NOT APPLICABLE
IN THIS MANUAL.
Figure 2. Water Switch Location
on Beacon
1.2. GENERAL DESCRIPTION
1.2.1. PHYSICAL CHARACTERISTICS. The DK
Series beacons consist of a self-contained battery,
an electronic module and a transducer. It is housed
in a cylindrical watertight aluminum case capable of
withstanding high-G impact shock and deep-water
immersion. As shown on page 6 and 7, the DK Se-
ries beacons operate for 30 days when immersed in
water. See Figure 2.
1.2.2. BEACON MOUNTING. The beacon is
mounted to a flight recorder or the airframe by
means of a mounting kit (See Section II). This
mount consists of an extruded channel, which in con-
junction with a securing plate retains the beacon.
Figure 1 shows the beacon mounted in the N30A21A
Mounting Kit, a strap-type mount. This mount is used for
applications where space limitations do not permit the
use of the simpler N30A26 Series cradle mount.
1.2.3. BEACON SIGNAL. The beacon is a battery-
powered device, which radiates a pulsed acoustic
signal into the surrounding water upon activation by
its water-sensitive switch. Search operations in water
for beacon equipped aircraft can be conducted by uti-
lizing a portable receiver equipped with a directional
hydrophone such as the Dukane Model DSL-375 Loca-
tor System (N30A5B no longer available for purchase).
This receiver system is operable from small boats or by
free swimming SCUBA divers. Aircraft lost in deep water,
i.e., in excess of 6000 feet (1829 meters), require special
search gear. Beacon Specifications are listed on page 6
and 7.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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