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Fairchild Swearingen Merlin IVC
Serial Number AT-577B
Registration N120JM

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The interior of this Merlin, formerly used as a surveillance plane, has been removed and numerous modifications have been accomplished. Two camera pods were built into the floor of the plane and SAT Comms along with various electronic equipment has been installed. A large portion of the avionics has been installed in cabinets along the aft end of the right hand interior and into the aft cargo bay.

The avionics installed are primarily Collins equipment. There is a Sperry C14 Flight Director on the Captains side, a standard HSI on the copilot side, dual TDR 90 Transponders, and dual Distance Measuring Equipment: one a 42 and one a 40 located in the aft of the cabin. Presently, there is no radar; formerly the plane had a special Radome installed for surveillance. The inverters have been relocated to the aft of the cabin and are fitted with non-standard inverters.

The aircraft was modified to 16,000 Maximum Gross Take Off Weight per FAC ECP437 and Drawing 27-13908, an FAA form 337 dated 4-9-85 is in the records showing the work accomplished.

Major Alterations to this Fairchild Swearingen Merlin IVC, serial number AT-557B are:

  • Test Flight for GPS, FMS – FAR 23.1529
  • Camera Installation – DER SW-153
  • Install UNS-1B Flight Management System – ST SA5072NM
  • High Endurance Surveillance System Installed – STC SA1518S0
  • 16000 Lb. Mod – Drw 27-13908
  • LS 400A Generator System – STC SA1470S0
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Downloadable Information:
Features and Specifications
Technical Inspection Report
916 Donata Ct.
Lake Zurich, IL 60047
847-847-3600 Telephone
847-847-3601 Facsimile
Dan Dickinson, President

916 Donata Ct. · Lake Zurich, Illinois 60047 · ph: 847-847-3600 · fx: 847-847-3601 ·
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