ACR&Artex C406-N - Manual (Page 30)

ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-N (453-5060), C406-N HM (453-5061)
25-62-13
Page 30 of 109
MAR 1/13
(6) After the ELT is activated and the 406 MHz signal is detected by the SAR satellite system and
a position is calculated, the 121.5/243.0 MHz transmissions are used to home in on the crash
site.
NOTE: Effective February 1, 2009, COSPAS-SARSAT has terminated the satellite processing
of distress signals from 121.5 and 243.0 MHz beacons.
(7) Aircraft communications transceivers are not capable of receiving 406 MHz transmissions;
therefore, the only methods of monitoring the ELT are:
(a) The blinking cockpit remote switch LED,
(b) The buzzer, or
(c) 121.5/243.0 MHz transmissions, which can be monitored using the aircraft
communications transceiver or an AM radio tuned to 121.5 MHz.
SUBTASK 25-62-13-870-002
B. Components
(1) The C406-N Series ELT main assembly is housed in a high impact, fire resistant, polycarbonate
plastic case, which is enclosed in a protective mounting frame assembly made of similar
material. See "Figure 2. C406-N Series ELT and Mounting Frame Assembly".
NOTE: The ELT main assembly and its mounting frame assembly are capable of
withstanding extremely harsh environments and have been subjected to the rigorous
environmental testing required by COSPAS-SARSAT for certification.
Figure 2. C406-N Series ELT and Mounting Frame Assembly
PROTECTIVE TOP
COVER ASSY
MOUNTING FRAME
CAP ASSY
ELT MAIN
ASSEMBLY
MOUNTING
TRAY ASSY
A
A
CONTROL
SWITCH
INTERFACE
CONNECTOR
ANTENNA BNC
CONNECTOR
LED
ANNUNCIATOR