STC SA4891NM

Installation of Honeywell Vertical Speed Indicator/Traffic Resolution Advisory (VSI/TRA) display.

Current Reissued Aircraft Large Multi-Engine Rev 02/28/2002 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)

A3WE The Boeing Company · 727C Series
A3WE The Boeing Company · 727-100 Series
A3WE The Boeing Company · 727
A3WE The Boeing Company · 727-200F Series
A3WE The Boeing Company · 727-100C Series
A3WE The Boeing Company · 727-200 Series

Certification basis — 14 CFR

Part 21

Specific sections

§ 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 ↗