STC SA3187SO

Installation of a replacement coalescer filter, Greentree Aerotech, Inc. (GAI) P/N 25TD47.

Historical Amended Aircraft Large Multi-Engine Rev 12/03/2004 View PDF on drs.faa.gov ↗

What is an STC?

A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.

Applicable aircraft (6)

A20WE The Boeing Company · 747-100 Series
A20WE The Boeing Company · 747-200B Series
A20WE The Boeing Company · 747-200C Series
A20WE The Boeing Company · 747-200F Series
A20WE The Boeing Company · 747-300 Series
A20WE The Boeing Company · 747-400 Series

Certification basis — 14 CFR

Part 21

Specific sections

§ 21.47
§ 21.111
§ 21.113
§ 21.115
§ 21.117
§ 21.119
§ 21.120

The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗