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Atlas / STC / SA3523NM

FAA · Supplemental Type Certificate

STC SA3523NM

Installation of an Allison turbine engine and related changes.

Historical Reissued Aircraft Single-Engine Rev 05/12/2003 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)

Certification basis — 14 CFR

Specific sections

  • Sec. 111
  • Sec. 113
  • Sec. 115
  • Sec. 117
  • Sec. 119
  • Sec. 120
  • § 21.47
  • Sec. 23.959
  • Sec. 23.967
  • Sec. 23.1121
  • Sec. 23.1583

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