Skip to content

Atlas / STC / SA590NW

FAA · Supplemental Type Certificate

STC SA590NW

Installation of Hartzell HC-B3R30-1/R10152-5-1/2 propeller, governor, and spinner on Pratt & Whitney R-985 series engine.

Historical Amended Aircraft Small Airplane Rev 11/24/2014 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 (1)

Certification basis — 14 CFR

Specific sections

  • Sec. 111
  • Sec. 113
  • Sec. 115
  • Sec. 117
  • Sec. 119
  • Sec. 120
  • § 21.47

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