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TASK 25-62-03-450-805
6. Wiring
SUBTASK 25-62-03-990-001
A.
General Considerations and Recommendations
CAUTION:
IF GROUND OR OTHER CONNECTIONS ARE BROKEN OR OTHERWISE DAMAGED, THE
ELT IS STILL CAPABLE OF AUTOMATIC ACTIVATION; HOWEVER, THE COCKPIT
REMOTE SWITCH MAY BE INCAPABLE OF RESETTING THE ELT AND OPERATION MAY
NOT BE INDICATED ON THE REMOTE SWITCH LED.
CAUTION:
INCORRECT TERMINATION OF THE WIRING IN THE CONNECTORS MAY DAMAGE THE
ELT, CAUSE TRANSMISSION ISSUES, OR RESULT IN A NON-FUNCTIONING REMOTE
SWITCH. VERIFY THE WIRING AGAINST THE WIRING DIAGRAM AND PERFORM A
CONTINUITY CHECK TO CONFIRM GOOD CONNECTIONS AND PROPER PIN
LOCATIONS.
CAUTION:
TO PREVENT INADVERTENT ELT ACTIVATION OR POSSIBLE COMPONENT DAMAGE,
DO NOT CONNECT THE HARNESS TO THE ELT OR COCKPIT REMOTE SWITCH PANEL
UNTIL ALL POWER AND GROUND WIRING CONNECTIONS ARE COMPLETED.
(1)
The following wiring and grounding considerations and recommendations are applicable:
(a)
Minimum 22 AWG wire size.
(b)
Shielding is recommended to help prevent EMI and RF interference.
(c)
Use high quality conductor meeting MIL-W-16878, M22759, M27500, or a commercial
equivalent acceptable for use in aircraft applications.
(d)
Provide a "Drip Loop" in the remote switch harness connection to the ELT to divert
moisture from the connector. See TASK 25-62-03-990-805, on page 21, for a definition.
(e)
Provide a "Service Loop" in the remote switch harness connection to the remote switch
panel, such that the assembly can be withdrawn from the panel far enough to easily
disconnect the harness plug. See TASK 25-62-03-990-805, on page 21, for a definition.
(f)
ELT and remote switch panel grounds must be common to aircraft ground.
SUBTASK 25-62-03-450-001
B.
Remote Switch Panel Harness Fabrication and Installation
(1)
In most cases, the aircraft has been pre-provisioned with wiring for connecting the ELT to the
G737 control panel (remote switch panel assembly). Install a remote switch panel harness in
accordance with the following instructions ONLY if wiring has not been provided and/or spare
wires are not available.
NOTE:
NOTE:
COBHAM AVIONICS WULFSBERG ELECTRONICS
ABBREVIATED COMPONENT MAINTENANCE MANUAL
B406-4 (453-5004)
If spare wires are used, terminate the wires in accordance with "Figure 18. Remote
Switch Panel Harness Wiring Diagram", on page 66, and the procedures herein.
If an ELT/NAV Interface -B (453-6501) is being installed with the ELT, refer to the
"ELT/NAV Interface -B Abbreviated Component Maintenance Manual" (570-6501) for
additional wiring instructions.
25-62-03
Page 65 of 86
APR 06/10
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