Manufacture weld-on float fittings in accordance with Airframes, Inc., Master Drawing List AF591078, Revision A, dated November 24, 2005, or later FAA approved revision. Install in accordance with Installation Instructions II591078, Revision O, dated February 22, 2006, or later FAA approved revision. Maintain in accordance with Instructions for Continued Airworthiness ICA591078, Revision O, dated November 28, 2005, or later FAA accepted revision View PDF on drs.faa.gov ↗

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