Model Westwind Astra 1125 (S/N -004 thru -041)Installation of Universal Avionics EFI-890R Flat Panel EFIS System with Optional Vision 1 Synthetic Vision 1 System, Optional Universal Avionics Application Server Unit, Optional WSI AV300/350 Weather Data Link System, and Thommen AC-32 Air Data Computer View PDF on drs.faa.gov ↗

The STC PDF is authoritative: installation instructions, ICA requirements and limitations.