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cific type or class of air craft to
determine that the air craft in stalla -
tion con ditions are within the TSO
standards. The ar ticle may be in -
stalled only if fur ther eval u a tion by
the ap plicant doc uments an ac cept -
able in stallation and it is ap proved
by the ad ministrator.”
The ELT is de signed with the in staller
in mind. Ex tra ef fort has been made
to sim plify the in stal la tion pro cess.
Because of the crit ical na ture of an
ELT, it is very im portant that the in -
stal la tion be per formed ac cording to
the fol lowing in struc tions. In stallation
of the ELT is some what unique; it re -
quires ex perience in sheet metal work
and avi onics. Only li censed tech ni -
cians should in stall the ELT.
Many prob lems as sociated with the
older ELTs were due to poor in stal la -
tions. Many of those poor in stalla -
tions oc curred at the fac tory on
new air planes. There fore, du pli cat -
ing a pre vi ous ELT in stal la tion with
the ARTEX ELT may not be ac cept -
able.
In ad dition to the pro cedures out lined
herein, the in staller must ad here to
the guide lines es tablished in
FAA-Advisory Cir cu lar 43.13-2A (Ac -
cept able Methods, Tech niques and
Prac tices -Air craft Al terations). Spe -
cifically, Chap ters 1 through 3, 11
and 13.
By sign ing ei ther the air craft log books
or the FAA Form 337, you are stat -
ing that the in stallation has been per -
formed in ac cor dance with the cur rent
FARs and with the steps and pro ce -
dures out lined herein.
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5060
05/12/03 PAGE 3-2
FIG URE 3-1 ELT AND RE MOTE SWITCH PANEL
In Can ada, all in stal la tions must be
performed in ac cor dance with Ca na -
dian Avi a tion Reg ulations (CAR) Part
V, Subparts 37, 51 and 71.
3.1. ELT Mount ing Lo ca -
tions
Many orig i nal ELT in stal la tions are in -
adequate as far as unit lo ca tion and
surface ri gid ity are con cerned. Just
be cause the “old” ELT was lo cated in
a par ticular po si tion does n’t mean the
“new” ELT should be lo cated there.
Statistics show that the tail sec tion of
an air plane is least likely to be dam -
aged dur ing a crash and, there fore,
pro vides a good mount ing en vi ron ment
for the ELT unit.
Ac ces si bil ity of the unit is an im por -
tant fac tor in the lo ca tion of the ELT.
Mount the unit as far aft as prac tical,
but where it can be eas ily re trieved
for main tenance.
The mount ing sur face must be ex -
tremely rigid, there fore, mount ing the
ELT di rectly to the air craft skin is un -
ac cept able.
Mount ing an ELT di rectly to the air -
craft skin in duces “crash hid ing” vi bra -
tions and pro vides a very poor structural
mount ing sur face. The mount ing
location must be able to sup port 100
pounds of force in any di rection with
no ap pre cia ble dis tor tion in the struc -
ture.
The fol lowing are the FAA guide lines
for mount ing an ELT (per RTCA
DO-183 Sec 3.1.8)
· “The ELT shall be mounted to pri mary
air craft load car rying struc tures such as
trusses, bulk heads, longerons, spars,
or floor beams.”
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5060
05/12/03 PAGE 3-3
#8 FLAT WASHER
(4 PLCS)
8-32x5/8 SCREW
(4 PLCS)
8-32x1/4 HEX NUT
(4 PLCS)
#8 LOCK WASHER
(4 PLCS)
AIRFRAME
EQUIPMENT
MOUNTING PLATE
FIG URE 3-2 MOUNTING TRAY IN STALLATION
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5060
03/22/04 PAGE 3-4
NOTES:
1. Allow 5 inches (12.7 cm) minimum clearance for end cap
removal and installation.
2. Unit weight: 4 lbs., 10 oz (2.1 kg)
3. Unit color: Orange
4. Unit Coax Connector: BNC (121.5/243/406.028 MHz)
5. Recommended interconnect wire gauge is 22 AWG.
(8.69 cm)
(9.91cm)
(29.82 cm)
(6.60 cm) (13.97 cm) (12.7 cm)
(9.70 cm)
(4.19 mm Dia.)
(5.1 cm)
FIG URE 3-3 ELT OUT LINE DI MEN SIONS
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5060
07/11/03 PAGE 3-5
FIG URE 3-3A AS SEMBLY CON FIGURATION
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5060
03/22/04 PAGE 3-6
(3.61 cm)
(31.75 cm)
(38.10 cm)
(6.35 mm)
(1.59 cm)
(6.4 cm)
(.2 kg)
(1.59 cm)
(8.3 mm)
(4.5 mm)
(19 mm)
(10.9 cm)
(4.5 cm)
(2.3 cm)
(4.1 cm) (2.1 cm)
(4.22 mm)
FIG URE 3-4 ROD AN TENNA (110-338) OUT LINE
　
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