Mooney M20TN, Service And Maintenance Manual

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MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Date
2006
Rev Date
Page 13
3. Remove batteries from the battery case. Examine
the battery contacts, any dirt or corrosion should be
gently removed using an electrical contact cleaner and
a stiff brush.
-- CAUTION --
Do Not use abrasive cleaners or materials to
clean the contacts. The contacts are Nickle and
Gold Plated spring steel. If the contacts appear to
be badly corroded, they must be replaced.
BATTERY PLACEMENT (AK-450)
FIGURE 39--15
4. Record the battery replacement date of the new bat-
teries being installed using one of the adhesive labels
provided with the ELT. Replace the (6) batteries with
new Duracell MN1300 “D” Cell (Alkaline Manganese
Dioxide) batteries. The “Date” indicated is the date by
which the batteries must be replaced. All batteries must
have the same date. Install the new batteries as indi-
cated by the battery installation placards which are af-
fixed to the inside of the battery case (Figure 39--15).
5. After installation, a voltage and polarity check must
be performed to insure that the batteries have been
installed correctly (Figure 39--15).
6. After performing the above voltage check, install the
battery case to the transmitter assembly, making sure
that all three “UP” arrow markings located on the bat-
tery case, the battery separator and the transmitter as-
sembly are in the same direction. Ensure that the “O-
Ring” seal is in place.
7. Place the transmitter assembly face down on a
bench. Press down on the battery case to compress the
battery contact springs. Replace the (4) battery retain-
ing screws and lock washers, evenly tighten until the
battery case is pulled flat against the transmitter as-
sembly. If the “O-Ring” appears to be pinched between
the case and the transmitter, back-off the screws slight-
ly and push the “O-Ring” back into place with a thin
screwdriver or a flat smooth object.
8. Remove any existing battery replacement date la-
bels from the battery case and install the new label you
prepared in a readily visible location on the ELT.
BATTERY INSTALLATION AND REPLACEMENT --
AMERI-KING AK-450 ELT REMOTE
The ELT remote is designed to be powered by a single
Duracell DL1/3NB 3 volt Lithium Battery. Under normal
operating conditions, the Lithium Battery must be re-
placed every eight (8) years. Alkaline type cells are
available from various manufacturers and may be used
in place of the Lithium cell. Under normal operating
conditions, the Akaline Battery must be replaced every
four years. If the ELT is activated for an unknown period
of time, the battery, Lithium or Akaline, must be re-
placed.
RETAINING
SCREWS (4)
RETAINING
NUT
SWITCH
SPLIT
PANEL
ELT REMOTE SWITCH (AK-450)
FIGURE 39--16
Remove AMERI-KING 450 ELT Remote
1. Loosen the switch retaining nuts located on the front
of the unit face (figure 39--16).
2. Remove the (4) mounting screws from the split panel
and the “Horseshoe” bracket (from behind unit). Slide
the ELT remote out of the Instrument Panel enough to
disconnect modular cable.
3. Carefully remove the top half of the remote unit, ex-
posing the battery compartment (figure 39--17). If re-
placing an old battery, carefully inspect the battery con-
tacts for dirt or corrosion. If the contacts need cleaning,
use only non-abrasive electrical contact cleaner and a
stiff brush.
-- CAUTION --
Do Not use abrasive cleaners or materials to
clean the contacts. The contacts are Nickle and
Gold Plated spring steel. If the contacts appear to
be badly corroded, they must be replaced.
4. Insert new battery with the polarity as shown in (fig-
ure 39--17). The polarity is also engraved on the bottom
of the battery compartment.
5. Replace top half of the remote unit and replace the
three retaining screws and tighten the two (2) switch re-
taining nuts.
39--12--02
AUGUST 2010