ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
B406-4 (453-5004)
Page 21 of 70
25-62-03
TASK 25-62-03-870-803
2.
Operation
SUBTASK 25-62-03-870-001
A.
Operational Overview
1)
See Figure 6 ELT Operational Flow Diagram.
2)
A primary feature of the B406-4 ELT is its simplicity of operation. As long as the ELT is connected to the
remote switch panel harness ELT connector, such that pins 5 and 8 are jumpered (G-switch loop), it will
activate in the event of a crash.
NOTE:
Neither the cockpit remote panel switch Nor the ELT local switch can be positioned in such
a manner as to prevent automatic activation when the ELT is connected properly.
Figure 6 ELT Operational Flow Diagram
3)
ELT operation is designed to prevent human error and misuse in regards to automatic activation. The
ELT cannot be activated by dropping, rough handling or during shipping.
4)
When the ELT is activated, the presence of the emergency sweep tone and the illuminated cockpit
remote switch panel light indicates an active ELT. The cockpit ELT remote panel light must immediately
illuminate upon ELT activation and stay on steady.
NOTE:
The local LED on the ELT flashes every 3-4 seconds when the ELT is activated.
5)
The ELT is considered to be either “ACTIVE” or “INACTIVE”. When “INACTIVE”, the ELT is in a state of
rest and performs no functions. Taking the ELT from the “INACTIVE” state to the “ACTIVE” state
requires a positive switch transition from either the cockpit remote switch, ELT local switch, or G-switch.
NOTE:
It is possible the G-switch could activate the ELT as the result of severe maneuvers or a very
hard landing.
