Installation of a dual port heated drain mast assembly in accordance with Magellan Services Company Master Document List 1002000000, Rev D, dated 3/7/12 or later FAA approved revision. The aircraft is to be maintained per the "Instructions for Continued Airworthiness", Magellan Services Company Document Number 1002050090, Rev IR, dated 11/14/11 or later FAA accepted revision. View PDF on drs.faa.gov ↗

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