Fabrication and installation of HTS-OCB-001 Electric Oil Blower Assembly per Helicopter Transport Services, Inc. (HTSI) Master Drawing List No. HTS-MDL-001, Revision IR, dated January 14, 2002, or later FAA approved revision. Limited to S/N's 69-18467, 69-18470, and 69-18484, only. View PDF on drs.faa.gov ↗

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