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cap. Pull the end cap away from the
ELT. Lift up the Pro tec tive Top Cover
and push away from the con nec tor end
of the ELT to re move. Lay Pro tec tive
Top Cover aside. Re move all in ter con nec -
tions to the ELT unit and ELT an tenna.
Visually in spect and con firm proper seat -
ing of all con nec tor pins. Spe cial attention
should be given to co ax ial cen ter
conductor pins which are prone to re tract -
ing into the con nec tor hous ing.
4.3.2 (Step 2) Re move ELT
Lift the ELT up from the con nec tor end
(careful use of a flat blade screw driver
as a le ver makes this step eas ier) to re -
move the ELT unit from its mount ing tray.
Inspect the mount ing hard ware. En sure
the hard ware is free of cracks or other
obvious dam age. All re quired mount ing
hardware should be in stalled and se cured
and must meet the in teg rity re quirements
as de fined herein.
4.3.3 (Step 3a) Re move Bat -
tery Pack
NOTE: The bat tery pack con tains
static sen sitive parts, take ESD pre cau -
tions be fore han dling. Re move the four
screws from the bat tery pack. Be fore pro -
ceed ing fur ther, read the fol low ing ad vi -
sory to avoid dam age to the ELT. For
de tailed in struc tions re fer to Sec tion 4.5
and Fig ure 4-4.
WARNING: The bat tery pack is con -
nected to the ELT via short in terconnect
har nesses which limit the dis tance of
sep a ra tion be tween the two com po nents
prior to dis con nect ing the har nesses. Pro -
ceed as fol lows:
· Lay the ELT on its side.
· Care fully lift the bat tery pack away from
the ELT and lay along side the ELT
unit.
· Care fully dis connect the har ness from
the 8-pin con nector on the small cir cuit
board in the bat tery pack. Do not short
con nec tor pins.
· Dis con nect 2-pin har ness from the ELT
body.
In spect the bat tery pack and the un der -
side of the ELT. The bat tery cells, com -
po nents and con nectors should be free of
cor ro sion. The un derside of the ELT
should be cor rosion free. In spect for any
bro ken wires or con nections. En sure the
ARTEX AIRCRAFT SUPPLIES DOCUMENT # 570-5060
03/22/04 PAGE 4-4
CAUTION:
Do not use contact cleaner on ELT
components. Such chemical agents can
be highly destructive to the mounting
hardware and ELT housing, causing
cracking, fracturing and breakage.
bat tery hous ing is free of cracks or other
vis i ble dam age.
Ver ify the bat tery ex pi ra tion date. If the
bat tery pack has not ex pired it may be
reinstalled. How ever, for op ti mum per for -
mance, it is rec om mended that the bat tery
be re placed if the volt age un der load is
less than 12.0 vdc. The bat tery pack
must be re placed with a new one:
· After use in an emer gency;
· After an in ad ver tent ac ti va tion of un -
known du ration;
· When the to tal of all known trans mis -
sions ex ceeds one hour;
· On or be fore the bat tery re placement
(expiration) date shown on bat tery label.
4.3.4 (Step 3b) Re place/Reinstall
Battery Pack
To re place/reinstall the bat tery pack, con -
nect the 8-pin con nec tor to the header on
the cir cuit board in the bat tery pack. Con -
nect the 2-pin power har ness to the ELT.
This step will cause the ELT to ac tivate.
Re set the ELT by tog gling the “ON/OFF”
switch on the ELT from “ON” to “OFF”.
Fit the bat tery pack into place dress ing
wires away from the stand offs to avoid
pinching wires be tween stand offs and bat -
tery pack. In stall two screws di ag o nally
from each other to se cure bat tery pack
dur ing the tests that fol low.
Note: If the check-out is go ing to con -
clude with Step 4 be low, then re seat the
bat tery pack on the ELT, dress ing the
harness wires away from the stand offs to
avoid pinch ing the wires be tween the bat -
tery pack and the stand offs. Re in stall the
four Phil lips head screws and tighten se -
curely. Do not over torque the screws.
4.3.5 (Step 4) G-Switch Check
NOTE: The ELT can not be ac ti vated
this way un less pins 12 and 13 are
jumpered (this hap pens au tomatically
when the unit is locked into the
mount ing tray with the con nec tor in
place). Be cause of the po ten tial phys i -
cal dam age which could oc cur through
an im proper jumper, it is rec om -
mended that this step be per formed
only by an ex perienced tech ni cian/me -
chanic. See “In stal la tion” sec tion of
　
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