Removal And Installation (Communications Components Corp. 5 Year Lithium Battery); Removal And Installation (Narco) - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
12-6. REMOVAL AND INSTALLATION (COMMUNICATIONS COMPONENTS CORP. 5 year lithium
battery.) The ELT is located under the dorsal fin between sta. 304.75 and sta. 317.00. (Refer to latest revision
of Piper Service Letter No. 820.)
a.
Remove the access panel on the dorsal fin.
b.
Rotate the ON/ARM/OFF switch to the OFF position.
c.
Disconnect the antenna coax cable (twist left, then pull outwards).
d.
Disconnect the harness to the pilot's remote switch.
e.
Remove the forward mounting bracket by pulling the black plastic knob out. Remove the
transmitter from the airplane.
f.
Remove the six Phillips-head screws securing the transmitter cover. Remove the cover.
g.
Lift out the old battery pack.
h.
Copy the expiration date on the battery into the space provided on the external ELT name and
date plate.
i.
Disconnect and replace with a new battery pack. The nylon battery connector is a friction fit and
is easily removed by pulling on the exposed end.
j.
Insert transmitter into airplane and fit into place. Reinstall mounting bracket by pushing the
black knob into place.
k.
Reconnect the pilot's remote switch harness and the antenna coax cable to the transmitter.
1.
Set the ON/ARM/OFF switch to the ARM position.
NOTE
It may be advisable to test the unit operation before installing the
access panel. (See Paragraph 12-8.)
m.
Reinstall the access panel previously removed.
n.
Make an entry in the aircraft logbook, including the new battery expiration date.
NOTE
Inspect the external whip antenna for any damage. Avoid bending
the whip. Any sharply bent or kinked whip should be replaced.
Antenna damage may cause structural failure of whip in flight.
12-7. REMOVAL AND INSTALLATION (NARCO.) The ELT is located under the dorsal fin. (Refer to
Figures 12-7 and 12-8.)
1.
Remove the access panel on the dorsal fin.
2.
Set the ON/OFF/ARM switch on the transmitter to OFF.
3.
Disconnect antenna coaxial cable from ELT.
4.
Remove ELT from its mounting bracket by releasing the latch on the strap and sliding the
ELT off the bracket.
5.
Extend the portable antenna. (See Figure 12-7.)
6.
Unscrew the four screws that hold the control head to the battery casing and slide apart.
7.
Disconnect the battery terminals from the bottom of the circuit board.
8.
Discard old battery pack. (DO NOT EXPOSE TO FLAME.)
CAUTION
The battery pack is shipped with a sealant on the inside lip so that
a water tight seal will be retained. DO NOT REMOVE THIS
SEALANT.
Revised: 3/11/81
ELECTRONICS
4A14