MAP018 – VHF/FM Radio Installation

Installation of a Technisonic TFM-138B VHF/FM Radio Transceiver to enable communication between helicopter and ships during LIMSAR operations. The Technisonic TFM-138B is a frequency agile airborne VHF/FM High Band transceiver operates from 138.000 MHz to 174.000 MHz in 2.5 KHz steps, providing for either 12.5 KHz (Narrow Band) or 25/30 KHz (Wide Band) channel spacing. It offers a two channel synthesized Guard Receiver (no crystals), 100 channels of preset memory, scan and priority scan, all available CTCSS tones, and can operate without restriction on any split frequency pair available within the band. Function control is via a panel mounted 12-button keypad.

A compatible external VHF Antenna is installed on the belly of the aircraft.










The modification includes (customer documents):

  • Mechanical installation drawings
  • Wiring diagrams
  • Cockpit control panels layout
  • Engineering orders
  • Instruction for Continued Airworthiness
  • Flight Manual Supplement