Sandel ST3400H HeliTAWS, Installation Manual

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1 GENERAL INFORMATION
1.1 Introduction
The information contained within this Installation Manual describes the features, functions,
technical characteristics, components, approval procedures, installation considerations, setup
procedures, checkout procedures and instructions for continued airworthiness for the Sandel
Avionics ST3400H Helicopter Terrain Awareness Warning System. For an explanation of the
operating controls of the ST3400H, refer to the Pilot’s Guide for the ST3400H, Sandel
Avionics P/N 82046-PG.
Sandel Avionics ST3400H HTAWS may be covered by one or more U.S. and foreign patents
and pending patent applications, including U.S. Patent Nos. 6,507,288, 6,489,916, and
6,259,378.
1.2 LIMITATIONS
The following stipulation as presented is required by the Federal Aviation Administration for
articles approved under Technical Standard Order. This statement does not preclude multiple
installation and operational approvals in regard to specific aircraft make, model, or type:
The conditions and tests required for TSO approval of this article are minimum performance
standards. Those installing this article, on or in a specific type or class of aircraft, must
determine that the aircraft installation conditions are within TSO standards. TSO articles must
have separate approval for installation in an aircraft. The article may be installed only
according to 14 CFR Part 43 or applicable airworthiness requirements.
Display of DME arcs, Holding Patterns, and Procedure Turns is not currently supported in the
ST3400H.
Any installation location is acceptable provided the ST3400H is installed adjacent to the
helicopter primary displays, it’s display and annunciations are visible to the pilot, and it’s
controls are reachable by the pilot or are suitably remote controlled.
Interconnection of the DC electrical supply to the ST3400H shall be via a non-essential bus for
installation in IFR rotorcraft unless replacing an existing instrument already approved on the
essential bus.
1.3 Radalt Indicator Replacement
The ST3400H Radalt function is provided to allow the ST3400H to replace an existing Radar
Altitude display. Both the current Radar altitude and the selected Minimums alerting altitude
are displayed in digital format.
If a Radar altimeter is not installed in the helicopter, the Radar Altitude will not be displayed
on the screen. The MINS display will be present and may be used by the pilot as a reference.
82046-IM-K ST3400H INSTALLATION MANUAL Page 1-1