ST3400 TAWS Software Revisions

To download the latest software for the ST3400 unit please use the following form:
Software Update Download

Note: Software versions denoted with 'A' are applicable only to Mod A hardware (serial numbers 2000 through 6-7349).
Software versions denoted with 'B' are applicable only to Mod B hardware (serial numbers 6-7350 and higher). 

B3.15 - Released 8/29/2016 

  • Added support for APN-194 radar altimeter 

A3.15 - Released 8/29/2016 

  • No operational changes

A3.14/B3.14 - Released 4/24/2014

  • Corrects potential communications issue with RS-232 GPS data during power-on sequence 

B3.13 - Released 2/14/2014

  • Support of ST3400 Mod B hardware

A3.13 - Released 4/10/2008

  • Corrected possible unintentional activation of RMI display mode

A3.12 - Released 3/12/2008

  • Factory testing

A3.11 - Released 2/14/2008

  • Added support for LED backlighting

A3.10 - Released 6/18/2007

  • Added option for alternate FLTA alert audio
  • Added selectable pilot/co-pilot position setting for bearing pointer colors
  • Removes possible erroneous TAWS FAIL indication on RMI and TCAS displays

A3.09 - Released 3/10/2006

  • Reduction of nuisance alerting for systems using analog air data computers operating in temperatures below standard by 20 degrees or more Celsius

A3.08 - Released 2/24/2005

  • Added support for separate analog LOC and VOR input
  • Added interface for ARINC 575
  • Added ARINC 565 coarse and fine synchro interface for PA and CBA selections
  • Added additional validity check for PDA
  • Extended database coverage to 73N latitude

 A3.07 - Released 11/10/2004

  • Added support for CIC 020702 air data computer
  • Modified filtering for radar altimeter data to reduce nuisance alerts
  • Changed default calibration value for composite NAV interface

A3.06 - Released 9/07/2004

  • Corrected display of composite NAV bearing pointer information
  • Corrected operation of external TAWS inhibit switch
  • Modified operation of ARINC 429 magnetic heading data

A3.05 - Released 8/03/2004

  • Factory testing

A3.04 - Released 7/28/2004

  • Factory testing

A3.03 - Released 7/15/2004

  • Change to support Mod A hardware
  • Self-test will operate all external annunciator lamps
  • TCAS key code not overwritten by configuration module
  • Display auto-dim function enabled
  • Improved lamp monitoring function
  • Corrected display of flight plans from KLN-94

3.07 - Released 10/14/2004

  • Corrected display of composite NAV bearing pointer information
  • Modified operation of ARINC 429 magnetic heading data
  • Modified filtering of radar altimeter data to reduce nuisance alerts
  • Changed default calibration value for composite NAV interface

3.02 - Released 4/16/2004

  • Ensure P3-8 "TCAS INH" function operates during maintenance page operations so it can also be used as "audio enable"

3.01 - Released 3/16/2004

  • Displayed TRK is flagged when it should not be flagged

3.00 - Released 2/25/2004

  • Implement a TAS/TCAS function
  • Implement a secondary VSI channel to support adjustment for TCAS-II VSI display
  • Added optional 400,300,200,100,50,40,30,20,10' callouts from RA
  • Allow selection of function of P3-8 discrete to support TCAS and external GPWS FAIL
  • Added optional DH callout
  • Added optional input for GS OVRD external switch
  • Added optional input for FLAPS OVRD external switch
  • Added optional BC discrete input to inhibit GS alert
  • Added processing to support FreeFlight 1201 GPS/WAAS module
  • Improved power fail recovery when power fail spike falls outside of DO-160D parameters
  • Improved OAT processing (new configuration)
  • Improved handling of ADF bearing on maintenance page
  • Flaps threshold not being stored in NVS
  • Improve available configurations of additional equipment
  • Increase amount of time unit will record data past 10 hours
  • Relocated annunciations to support inclusion of TCAS
  • Support a configuration with Pressure Alt but without CBA
  • Improved tests to split pressure and CBA altitudes to better show if correct source is being used
  • Added ramp down audio output at end of clip to reduce noise
  • Added reduced low-end of brightness adjustment

2.04 - Released 1/13/2004

  • Assure enough time to read the full parameter block during power-up

2.03 - Released 9/11/2003

  • Lamp cycle counter counts multiple times on system turn-on
  • Lamp hours resets on software upload
  • Lamp hours updated when displaying splash screen, fatal error or CM information
  • Altitude values in the Himalayan mountains are sometimes treated as negative values, or ocean-code

2.02 - Released 8/10/2003

  • Make provision for radar altimeter RT100
  • Incorporated support  AHRS, 429, heading status input with roll angle
  • Improved startup operation
  • Incorporated on Ground Disable of Class B alerts
  • Incorporated selection for additional GPS receivers
  • Assured waypoint text always shown
  • Incorporated support additional support for airdata computers
  • Added ranges lower than 5nm
  • Improve fail equipment errors
  • Added new discrete out
  • Activate Config Module
  • Improve handling of and added some maintenance Mode items in software
  • Code style impovements

2.01 - Released 4/17/2003 

  • Supports Shadin Serial ADC input
  • Support for synchro flap input
  • Improved handling of partial inverter failure

2.00 - Released 2/25/2003

  • Supports GPS altitude from Garmin 400/500 series GPS receivers
  • Supports pressure altitude input from ARINC 429 ADC
  • Improved display of GPS flight plans
  • Corrected display of flight plan when direct-to on GPS is used to bypass waypoints
  • Supports KRA-405 and RT-100 radar altimeters
  • Added display of course line when GPS is in OBS mode
  • Improved GPWS Mode 5 logic
  • Supports analog OAT probe input
  • Supports high speed ARINC 429 GPS/FMS input
  • Support AZ-252 ADC
  • Improved display processing routines

1.05 - Released 11/01/2002

  • Support Collins ADC-80
  • Improve USB port performance
  • Support discrete input for radar altimeter failure

1.04 - Released 6/28/2002

  • Initial release