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3.7, page 3-19 of this man ual.
· If your ELT front panel in dicator light is
wired through ei ther the air craft mas ter
or the avi onics mas ter switch, make
sure these switches are turned on.
· Tune a re ceiver (usu ally the air craft ra -
dio) to 121.5 MHz.
· Turn the ELT air craft panel switch to
“ON”, wait for 3 sweeps on the re ceiver,
which takes about 1 sec ond, and then
turn the switch back to the “ARM”
(OFF) po sition while pay ing spe cial at -
tention of the LED ac tiv ity upon en ter -
ing the “ARM” (OFF) con di tion.
To pass the test, you must hear the 3
sweeps AND see the front panel light im -
me di ately be gin to flash con tin u ously.
During the ON to OFF tran si tion, the mi -
cro pro ces sor in the ELT checks the
“G-Switch” (au to matic ac ti va tion switch)
latching cir cuit, pins 5 & 8 on the 12-pin
con nec tor at the ELT; the 406.028 MHz
trans mit ter for proper RF out put; that po -
si tion data is pres ent and a bat tery
check. If the ELT is work ing prop erly, the
se quence fol lowing en try to the “ARMED”
(OFF) con di tion will re sult in the panel
LED stay ing il luminated for ap prox i mately
1 sec ond, then ex tinguishing.
If a prob lem is de tected, the LED pro -
vides a coded sig nal fol lowing the ini tial
1 sec ond pulse. The coded sig nal and
re lated prob lem are as fol lows:
· a) 1 flash in di cates a G-switch loop
open fail ure.
ARTEX AIRCRAFT SUPPLIES DOCUMENT # 570-5060
03/22/04 PAGE 4-13
ARTEX AIRCRAFT SUPPLIES DOCUMENT # 570-5060
07/11/03 PAGE 4-14
ELT ASSEMBLY
FIGURE 4-4 ELT/BAT TERY PACK EX PLODED VIEW
· b) 3 flashes in di cates a 406.028 MHz
transmitter prob lem (i.e. bad or un con -
nected coax ca ble, an an tenna prob lem,
low power out put or a pro gramming er -
ror).
· c) 5 flashes in di cates there is no nav i ga -
tion data pres ent. This is most likely due
to im proper wir ing be tween the sys tem
interface con nections or im proper in -
valid nav igation data. NOTE: This er ror
is hid den if the ELT is pro grammed with
a short mes sage (User Pro to col).
· d) 7 flashes in di cates a bat tery prob lem
(i.e. bat tery us age time over an hour).
There is a se quence as signed to the
problem re port which is the same or der
as listed above. If the G-switch cir cuit has
a fail ure, there will be a sin gle flash. If
there also is a 406.028 MHz trans mitter
problem then af ter the sin gle flash and a
1 sec ond pause, 3 flashes would ap pear.
NOTE: There is an er ror con dition where
the LED on the ELT and re mote switch
will flash rap idly with a 2 flash pulse
comprised of a short and a long flash.
This oc curs im mediately af ter power is
applied to the ELT if ei ther of the fol low -
ing oc curs:
1) The ELT is not us ing the op tional
C406-N Pro gramming Adapter (P/N
453-5068) and pins 3 and 4 are not
jumpered (or con nec tion is in ter rupted) at
the mat ing cir cu lar con nec tor.
2) If the Pro gramming Adapter is used,
there is a com mu ni ca tion prob lem or wir -
ing er ror.
Note: This er ror will con tinue for up to 1
minute even af ter air craft power is re -
moved due to the in ter nal ELT power
sup ply backup.
4.3.17 (Step 8) An tenna Test
Ac tion No tice A 8150.3 ad vises that:
“A low qual ity AM broad cast re ceiver
should be used to de ter mine if en ergy is
be ing trans mit ted from the an tenna.
When the an tenna of the ra dio (tun ing
dial on any set ting) is held about 6
inches from the ac ti vated ELT an tenna,
the ELT au ral tone will be heard on the
AM broad cast re ceiver. This is not a
mea sured check, but it does pro vide con -
fi dence that the an tenna is ra diating suf fi -
cient power to aid search and res cue.
The air craft’s VHF re ceiver, tuned to
121.5 MHz, may also be used. This re -
ceiver, how ever, is more sen si tive and
could pick up a weak sig nal even if the
ra di at ing ELT’s an tenna is dis con nected.
Thus it does not check the in teg rity of
the ELT sys tem or pro vide the same
level of con fi dence as does an AM ra -
dio.”
4.3.18 (Step 9) Log book En try
Enter the date the test tech ni cian’s initials
and whether the ELT passed or
failed into the air craft’s log book.
4.4. Sum mary of Min imum
Re quire ments
4.4.1 Spec i fi ca tions @ 121.5
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DESCRIP TION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL(22)
