STC SH2224NM

Installation of dual Sperry EDZ-705 Electronic Flight Instrument Systems, (EFIS).

Current Reissued Aircraft Rotorcraft Rev 03/19/2020 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 (2)

H1NE Sikorsky Aircraft Corporation · S-76A
H1NE Sikorsky Aircraft Corporation · S-76B

Certification basis — 14 CFR

Part 21
Part 29

Specific sections

§ 21.47
§ 21.120

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