Install modified engine cowl per Cascade Aircraft Conversions LLC Master Drawing List CAC-MDL-PT Thrush, Revision IR, dated April 4, 2004, and Cascade Aircraft Conversions LLC Document FW-CAC331-12, "Installation Manual," Revision IR, Dated April 24, 2004, or later FAA approved revisions to either of these document. View PDF on drs.faa.gov ↗

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