Dukane Seacom DK100 User manual

03-TM-0037 REV B Page 1 of 24
DUKANE SEACOM, INC. SARASOTA, FLORIDA 34243 PHONE: [phone] FAX: [phone]
DOCUMENT NO. 03-TM-0037 © DUKANE SEACOM, INC.
INTERNET: www.dukaneseacom.com
NOVEMBER 13, 2017
REV B
TECHNICAL MANUAL
UNDERWATER ACOUSTIC BEACON
MODELS DK100/DK120/DK130/DK140
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03-TM-0037 REV B Page 2 of 24
This manual should be read in its entirety prior to
any installation, operation, testing or maintenance
of the DK100/DK120/DK130/DK140 Underwater
Acoustic Beacons.
The information contained in this manual is intended to
assist with the installation, maintenance, and use of the
models DK100/DK120/DK130/DK140 Underwater
Acoustic Beacon when attached to an aviation data
recorder. For other applications of these products
please contact the factory for information regarding
the warranty, installation, maintenance, and use.
VALIDATION OF OPERATIONS DESCRIBED IN THIS MANUAL
The maintenance operations described in this manual have been checked in
manufacturer's workshops by an exact carrying out of dismantling, reassem-
bly, test and repair instructions which are detailed in this document.
These operations are those in use at the latest revision date of the document.
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03-TM-0037 REV B Page 3 of 24
TABLE OF CONTENTS
SECTION I ........................................................................................................................................... 5
GENERAL INFORMATION ................................................................................................................ 5
1.1. INTRODUCTION. ................................................................................................................................ 5
1.2. GENERAL DESCRIPTION. ................................................................................................................................ 5
SECTION II .................................................................................................................................... 8
INSTALLATION ................................................................................................................................................ 8
2.1. GENERAL. ............................................................................................................................................. 8
2.2. INSTALLATION CRITERIA OF THE BEACON. .............................................................................................. 8
2.3. SURVIVABILITY. ................................................................................................................................................. 8
2.4. ENVIRONMENTAL. ........................................................................................................................... 8
2.5. MAINTENANCE. ................................................................................................................................. 8
2.6. INSTALLATION PROCEDURES FOR THE DK100/DK120 AND THE N30A26 SERIES
MOUNTING KIT. ........................................................................................................................................ 9
2.7. INSTALLATION PROCEDURES FOR THE DK100/DK120 AND THE N30A21A MOUNT‑
ING KIT. .................................................................................................................................................................. 10
2.8. INSTALLATION PROCEDURES FOR THE DK130/DK140 AND THE N30A29 SERIES
MOUNTING KIT. ...................................................................................................................................... 12
2.9. INSTALLATION PROCEDURES FOR THE DK130/DK140 AND THE N30A21A
MOUNTING KIT. ...................................................................................................................................... 13
SECTION III ................................................................................................................................. 15
OPERATION ................................................................................................................................ 15
3.1. THEORY OF OPERATION. ................................................................................................................................................. 15
SECTION IV ................................................................................................................................. 16
TESTING .............................................................................................................................. 16
4.1. GENERAL. ........................................................................................................................................... 16
4.2. BATTERY TESTING.. ........................................................................................................................................ 16
4.3. OPERATIONAL TESTING. ......................................................................................................................................... 16
SECTION V .................................................................................................................................. 17
MAINTENANCE DK100/DK130 .................................................................................................................. 17
5.1. GENERAL. ........................................................................................................................................... 17
5.2. BEACON CLEANING. ............................................................................................................................ 17
5.3. BEACON TESTING. ................................................................................................................................ 17
5.4. PRECAUTIONS. ................................................................................................................................. 17
5.5. BATTERY. ............................................................................................................................................................. 17
5.6. BEACON DISPOSAL. ........................................................................................................................ 17
5.7. BEACON STORAGE. ........................................................................................................................ 17
SECTION VI ................................................................................................................................. 18
MAINTENANCE DK120/DK140 .................................................................................................................. 18
6.1. GENERAL. ........................................................................................................................................... 18
6.2. BEACON CLEANING. ............................................................................................................................ 18
6.3. BEACON TESTING. ................................................................................................................................ 18
6.4. PRECAUTIONS . ............................................................................................................................................................ 18
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6.5. BEACON DISASSEMBLY. .................................................................................................................... 18
6.6. BATTERY REPLACEMENT AND TESTING. ..................................................................................................... 18
6.7. BEACON OFF-CURRENT TEST. ......................................................................................................................... 21
6.8. BATTERY DISPOSAL. ...................................................................................................................................... 21
6.9. BEACON STORAGE. ........................................................................................................................ 21
SECTION VII ............................................................................................................................... 22
WARRANTY DK100/DK120/DK130/DK140 ............................................................................................ 22
SECTION VIII ................................................................................................................................... 23
SERVICE PROGRAM DK100/DK120/DK130/DK140 ........................................................................ 23
8.1. BEACON RETURN - DEFECTIVE. ............................................................................................................... 23
8.2. BEACON RETURN - NO DEFECT. ............................................................................................................... 23
8.3. BEACON RETURN - OUT OF WARRANTY. .................................................................................................. 23
8.4. BATTERY CHANGE/OVERHAUL FOR THE DK100/DK120/DK130/DK140. ............................... 23
SECTION IX ................................................................................................................................. 24
PROCEDURE FOR RETURNING DK100/DK120/DK130/DK140 ................................................... 24
BEACON TO FACTORY ................................................................................................................. 24
9.1. BEACON SERVICE. ................................................................................................................................ 24
9.2. BATTERY CHANGE/OVERHAUL. ......................................................................................................................... 24
TABLE OF FIGURES
Figure 1. DK Series Underwater Acoustic Beacon Installed in Mounting Kits ....................................... 5
Figure 2. Water Switch Location on Beacon ............................................................................................. 5
Figure 3. N30A26 Series Mounting Kit Installation Details (N30A26B shown) .................................. 9
Figure 4. Installation of N30A26 Series Mounting Kit and Beacon ....................................................... 10
Figure 5. Mounting Hole Template for N30A21A Mounting Kit ............................................................. 10
Figure 6. N30A21A Mounting Kit and Beacon Overall Dimensions .................................................. 11
Figure 7. Method of Installing the N30A21A Mounting Kit ............................................................... 11
Figure 8. Securing Beacon in N30A21A Mounting Kit ..................................................................... 11
Figure 9. N30A29 Mounting Kit Installation Details ........................................................................... 12
Figure 10. Installation of N30A29 Series Mounting Kit and Beacon ..................................................... 13
Figure 11. Mounting Hole Template for N30A21A Mounting Kit ........................................................... 13
Figure 12. N30A21A Mounting Kit and Beacon Overall Dimensions ................................................... 14
Figure 13. Method of Installing the N30A21A Mounting Kit ................................................................... 14
Figure 14. Securing Beacon In N30A21A Mounting Kit ........................................................................ 14
Figure 15. Nominal Pulse Train ........................................................................................................ 15
Figure 16. Typical Beacon Label ................................................................................................................. 16
Figure 17. Beacon Voltage Code .............................................................................................................. 16
Figure 18. Battery End Cover Removal With Vise Clamp and Spanner Wrench .................................. 19
Figure 19. Battery Kit Part Number ......................................................................................................... 19
Figure 20. Beacon Exploded View Showing Relative Location of Battery and Related
Parts ........................................................................................................................................................ 20
Figure 21. RBB Label Placement ............................................................................................................ 21
Figure 22. Beacon Off-Current Test Set-Up ................................................................................................................... 21
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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.
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03-TM-0037 REV B Page 6 of 24
DK100/DK120 BEACON SPECIFICATIONS
Operating Frequency...................................................
Operating Depth..........................................................
Pulse Length................................................................
Pulse Repetition Rate..................................................
Operating Life..............................................................
Battery Life In Beacon..................................................
Acoustic Output, Initial................................................
Acoustic Output After 30 Days....................................
Operating Temperature Range......................................
Actuation......................................................................
Radiation Pattern..........................................................
Size...............................................................................
Weight, Beacon.............................................................
Weight, N30A26B Mount............................................
Weight, N30A21A Mount............................................
Storage Temperature Range..........................................
37.5 kHz ± 1 kHz
Surface to 20,000 feet (6096 meters)
9.0 milliseconds Minimum
Not less than 0.9 Pulse/Sec
30 days (minimum)
6 Years
1060 dynes/cm2 rms pressure at 1 meter (160.5dB)
700 dynes/cm2 rms pressure at 1 meter (157.0dB)
+28°F (-2.2°C) to +100°F (+37.8°C)
Fresh or salt water
Rated output over 80 percent of sphere
1.30 inches (3.30 cm) diameter x 3.92 inches
(9.95 cm) long (less mount)
6.7 ounces (190 grams)
6 ounces (170 grams)
3 ounces (85 grams)
-67°F (-55°C) to +160°F (+71°C)
1.2.4. ENVIRONMENTAL TEST. The beacon complies with the preceding operational performance
standards after being subjected to environmental tests specified in FAA TSO-C121.
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03-TM-0037 REV B Page 7 of 24
DK130/DK140 BEACON SPECIFICATIONS
Operating Frequency .................................
Operating Depth ...........................................
Pulse Length ..............................................
Pulse Repetition Rate ...................................
Operating Life ..................................................
Battery Life In Beacon ..................................
Acoustic Output, Initial ..................................
Acoustic Output After 30 Days .....................
Operating Temperature Range ....................
Actuation ....................................................
Radiation Pattern ..........................................
Size .............................................................
Weight, Beacon .............................................
Weight, N30A29 Mount ..............................
Weight, N30A21A Mount ............................ ...
Storage Temperature Range .........................
37.5 kHz ± 1 kHz
Surface to 20,000 feet (6096 meters)
9.0 milliseconds Minimum
Not less than 0.9 Pulse/Sec
30 days (minimum)
6 Years
1060 dynes/cm
2
rms pressure at 1 meter
(160.5dB)
700 dynes/cm
2
rms pressure at 1 meter (157.0dB)
+28°F (-2.2°C) to +100°F (+37.8°C)
Fresh or salt water
Rated output over 80 percent of sphere
1.30 inches (3.30 cm) diameter x 2.97 inches
(7.54 cm) long (less mount)
4.9 ounces (139 grams)
3.5 ounces (99 grams)
3 ounces (85 grams)
-67°F (-55°C) to 160°F (71°C)
1.2.5. ENVIRONMENTAL TEST. The beacon complies with the preceding operational performance
standards after being subjected to environmental tests specified in FAA TSO-C121.
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03-TM-0037 REV B Page 8 of 24
SECTION II
INSTALLATION
2.1. GENERAL.
This section describes the installation of the beacon
mounting kits and the installation of the DK Series
beacons into these mounts.
2.2. INSTALLATION CRITERIA OF THE BEA-
CON.
NOTE
All installations to Cockpit Voice Recorders and
Flight Data Recorders should be in accordance
with the recorder manufacturer’s approved proce-
dures and hardware.
2.3. SURVIVABILITY.
2.3.1. The beacon location should minimize the proba-
bility of physical damage to the device during water
impact. The aft mid section of the aircraft is normally
the most desirable location for the beacon, but con-
sideration must be given to environmental conditions
outlined in Section 2.4.
2.3.2. The area selected for the beacon mounting should
be free of the possibility of heavy equipment tearing
loose and striking the device.
2.3.3. Installation should be made to a substantial
structural member, but kept as simple as possible
and must not weaken the structural member.
2.4. ENVIRONMENTAL.
2.4.1. The DK Series beacon must not be disas-
sembled, crushed, penetrated, incinerated or exposed
to temperatures above 160°F (71°C).
2.4.2. The beacon is a battery powered device and
installed shelf life is affected by higher than normal
temperatures. Maximum temperature must not ex-
ceed 160°F (71°C).
2.4.3. Inadvertent actuation of the water switch by any
source of water, such as rain, salt spray, melting ice or
snow, head or washroom overflow, foods and beverages,
must be avoided.
2.4.4. In order to avoid accumulation of moisture on
the water switch, the device should be mounted
with the long axis of the beacon horizontal or with
the water switch facing down. A clean switch will
allow moisture to collect into droplets and run off the
switch, without activating the beacon.
2.4.5. Honeycomb structure, tarpaulin fabrics, cloth-
ing, parachutes, cargo, etc., are sound absorbing ma-
terials. Do not surround the device with these materi-
als and if necessary, remove small areas of such ma-
terials from the immediate vicinity.
2.4.6. Any compartment that may not be expected to
flood under light impact should not be used. Direct
contact between the beacon case and water is neces-
sary for actuation and acoustic radiation.
2.5. MAINTENANCE.
In addition to observance of the preceding manda-
tory considerations, where possible the selection of
a mounting location should provide for convenient
beacon access during inspection intervals. The prop-
er mounting location should also provide for clear-
ance for removing the beacon from its mounting hard-
ware.
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03-TM-0037 REV B Page 9 of 24
2.6. INSTALLATION PROCEDURES FOR
THE DK100/DK120 AND THE N30A26 SE-
RIES MOUNTING KIT.
2.6.1. GENERAL. Model N30A26 Series Mounting
Kit (Cradle Type) is an aluminum extrusion with a
screw attached securing plate that provides rugged
mounting and protection of the beacon within the aircraft.
See Figure 3. The beacon should be mounted horizontal-
ly with the switch end forward, if possible. If vertical
mounting is necessary, switch end must be mounted
downward to prevent accumulation of dirt, grease and
water on the switch end.
2.6.2. CRADLE MOUNTING PROCEDURE.
A. Using Figure 3 as a guide, locate the four 0.290
inch (0.737 cm) diameter holes on 1.500 by 2.400 inch
(3.810 by 6.096 cm) centers. Be sure access to the se-
curing plate end is available for future beacon installa-
tion and removal. Approximately 4.5 inches (11.43 cm)
clearance should be allowed for beacon removal.
NOTE
The mounting bracket can be used as a template
to mark for drilling the holes prior to the instal-
lation of beacon. Always remove beacon from
mount prior to marking or drilling.
CAUTION
WHEN MOUNTING TO THE AIR-
FRAME, CHECK THE OPPOSITE SIDE
OF THE FRAME OR BULKHEAD FOR
DRILLING CLEARANCE.
WARNING
USE PROTECTIVE EYE EQUIPMENT
DURING DRILLING OPERATION.
B. After the four 0.290 inch (0.737 cm) diameter
holes have been located, drill the holes with an “L”
twist drill.
C. Secure the mounting cradle to the aircraft structure
with four 1/4-20 stainless steel screws and associat-
ed washers and nuts (not furnished), as shown in
Figure 3. Alternate mounting with threaded holes may
be employed where structure does not permit nuts on
rear side.
CAUTION
DO NOT ADD ANY UNAPPROVED
STAMP, ETCHING, OR LABEL TO
THE BEACON CASE OR END CAPS.
2.6.3. INSTALLING DK100/DK120 BEACON IN-
TO N30A26 SERIES MOUNTING KIT.
A. If the securing plate and its attaching hardware
are already attached to the main body of the mounting
cradle, remove them.
B. Make sure that the beacon case and water
switch are free of grease or film. If in doubt, wipe
clean with mild detergent.
Figure 3. N30A26 Series Mounting
Kit Installation Details
(
N30A26B shown)
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03-TM-0037 REV B Page 10 of 24
C. Test the beacon as outlined in Section IV to en-
sure operation prior to installation.
D. Insert the beacon into the mounting cradle with the
water switch facing forward and/or downward with ref-
erence to the aircraft. Rotate the beacon in the mount
so that the beacon replacement date can be read. See
Figure 4.
E. Screw securing plate in place with the set of fur-
nished screws and washers. Tighten until the securing
plate makes contact with the frame in the area of the
screws, with approximately 15 to 20 inch-pounds
torque.
F. Perform the Operational Test outlined in Section
IV.
2.7. INSTALLATION PROCEDURES FOR THE
DK100/DK120 AND THE N30A21A MOUNT-
ING KIT.
2.7.1. GENERAL. Space limitations sometimes re-
quire the use of the strap-type N30A21A Mounting
Kit. Where a choice exists, horizontal mounting with
switch forward is best. If vertical mounting is em-
ployed, mount switch down to reduce accumulation
of grease, dirt, and water on the switch end of the bea-
con.
2.7.2. MOUNTING PROCEDURE
A. Lay out four holes as shown in Figure 5. Posi-
tion mounting kit carefully to avoid interference with
other structures. Observe the clearances required as
shown in Figures 5 and 6, and in established tool
and maintenance clearances.
B. Drill the four 0.272 inch (0.691 cm) (“I” drill) holes
in the mounting surface as shown in Figure 5.
Figure 5. Mounting Hole Template
for N30A21A Mounting Kit
C. Test the beacon as outlined in Section IV to en-
sure operation prior to installation.
D. Slip the retainer straps of the mounting kit over
the ends of the beacon. See Figures 7 and 8.
E. Insert the ends of the retainer straps through the
0.272 inch (0.691 cm) holes in the mounting surface.
When horizontal mounting is used, position beacon
with switch end forward.
Figure 4. Installation of N30A26
Series Mounting Kit and Beacon
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