The RCP is installed on the cockpit overhead-panel and held in position with two captive screws. It is an enclosed box with a lighted front panel. The front panel has an ON/TEST indicator and an ON-ARMED-TEST/RESET switch. The back panel has an identification placard and a connector to connect the RCP to the RCP connector on the ELT.
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RCP - Component Description Figure 007
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(4) Antenna (112MX)
(Ref. Fig. 008)
The antenna is installed on the upper external fuselage between FR64 and FR65 and held in position with six screws. It transmits three-frequency omni-directional signals when the ELT operates. It has a radiating element placed in a printed circuit which is enclosed in a fiberglass radome on a aluminum-alloy base plate. The base plate has a BNC connector on the lower side, which is sealed with an O-ring. The BNC connector is connected by coaxial cable to the ANT connection on the ELT. The coaxial cable is covered in a fire resistant hose/tape.
R **ON A/C 102-149, 201-210, 229-299, 303-399, 401-499,
H. Antenna (112MX)
(Ref. Fig. 009)
The antenna is installed on the upper external fuselage between FR64 and FR65 and held in position with six screws. It transmits three-frequency omni-directional signals, if an emergency locator transmitter (ELT) is installed and operates. It has a radiating element placed in a printed circuit which is enclosed in a fiberglass radome on a aluminum-alloy base plate. The base plate has a BNC connector on the lower side, which is sealed with an O-ring. The BNC connector is connected by coaxial cable to the ANT connection on the ELT (if installed). The coaxial cable is covered in a fire resistant hose/tape.
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Antenna - Component Description Figure 008
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Antenna - Component Description Figure 009
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**ON A/C 151-199, 211-228, 301-302,
6. Operation/Control and Indicating________________________________
A. ELT System
(Ref. Fig. 003)
(1) ELT (110MX)
(Ref. Fig. 006)
The ELT transmits distress signals, installed in the aircraft, or used in portable mode. When the ELT is installed, it can be operated automatically or manually. When you use the ELT in portable mode it is operated manually. In portable mode you connect the antenna to the ANT connection on the ELT. You must remove the antenna carefully from the loops on the straps, because it is folded, and will spring quickly back to a straight position. In an emergency over water you remove the tether from the strap and attach it to a life raft.
The two battery-packs supply the power to operate the ELT, installed in the aircraft, or used in portable mode. The 3 cell battery-pack supplies power to the electronic board which includes the G-switch, and the 2 cell battery-pack supplies power to the G-switch.
The 121,5/243 MHz transmitter transmits a "sweep" distress signal for more than 48 hours at -20.0 deg.C (-4.00 deg.F) in automatic or manual operation. The distress signal transmits continuously with an output power of 100 mW on each frequency. The transmission starts immediately after the BITE test sequence is completed.
The 406 MHz transmitter transmits a digital signal for 24 hours at -20.0 deg.C (-4.00 deg.F) in automatic or manual operation. The digital signal is a message of 122 bits (aircraft identification) transmitted every 50 seconds for 440 msec. The first transmission starts after 50 seconds.
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