ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-1 (453-5002), C406-1HM (453-5003)
Page 59 of 67
Feb 28/2019
25-62-10
SUBTASK 25-62-10-990-002
B.
Recommendations
1)
Artex recommends installation of the C406-1HM ELT in helicopters. The C406-1HM ELT is equipped with a
5-axis G-switch module in addition to the usual primary G-switch, which is oriented to the direction of
flight. See Figure 26.
Figure 26 ELT Orthogonal Axes
2)
The six-axis coverage of the C406-1HM design accommodates the flight characteristics of helicopters,
while allowing “normal” installation and eliminating or significantly reducing “nuisance” ELT activations.
SUBTASK 25-62-10-410-001
C.
Orientation
1)
Mount the C406-1HM ELT parallel to the waterline of the fuselage, along the longitudinal axis, with the
direction-of-flight arrow on the ELT pointing forward. See Figure 27.
NOTE: This is the orientation of the primary G-switch in the ELT.
2)
The ELT may be angled downward as much as 25°, if necessary.
NOTE: Keep in mind, the steeper the mounting angle, the more pre-load on the primary G-switch
and the increased likelihood of “nuisance” activations.
3)
All other installation requirements contained herein are applicable and must be adhered to.
Figure 27 Orientation of ELT for Helicopter Installations
