Narco Elt 910 Emergency Locator Transmitter Schematic - Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual

PIPER CHEROKEE WARRIOR SERVICE MANUAL
12-13. NARCO 910 ELT BATTERY REMOVAL AND INSTALLATION (S/N'S 2890140 THRU
2890205) (REFER TO FIGURES 12-8 AND 12-9.)
a. Remove access panel located at fuselage station 228.30.
b. Set ON/OFF/ARM switch on transmitter to OFF.
c. Disconnect antenna coaxial cable from ELT.
d. Disconnect wiring harness connector from ELT.
e. Remove ELT from its mounting tray.
f. Remove 8 flat head screws from unit. (Refer to Figure 12-9.)
g. Carefully separate unit into two sections.
h. Unsnap battery connector (connector toward back end of circuit board). (Refer to Figure 12-9.)
i. Carefully remove battery pack (contained in white foam jacket) from the ELT.
j. Cut tape holding the two halves of foam together and remove old battery pack.
k. Install new battery pack in foam jacket. Tape foam halves together with a good quality glass
filament tape.
l. Install battery pack assembly into ELT. Plug connector into circuit board.
m. Slide the two unit section together. Ensure red gasket in header is sitting flat.
n. Secure with 8 new screws provided with replacement battery. Ensure all 8 screws are snugged up.
o. Install ELT into tray in airplane. Perform tests as specified below.
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.
TERMINAL
GND
Figure 12-8. Narco ELT 910 Emergency Locator Transmitter Schematic
12-14. TESTING ELT 910 EMERGENCY LOCATOR TRANSMITTER
Consult FAA Advisory Circular AC 20-81 for detailed testing
information and precautions
a. Conduct test only during the first five minutes after any hour.
Added: February 28, 1995
— NOTE —
P203
J501
6
6
20B
8
8
7
7
9 9
5
5
4
3
2
1
ELT
ELT 910
REMOTE
SWITCH
NOTE
2J22
Island Enterprises
F1
20R 20R ELT SW PWR
1/2 A
4
3
2
1
BUS
+14 VDC
ELT
SW
PWR
ELECTRONICS