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Atlas / STC / SA04176NY

FAA · Supplemental Type Certificate

STC SA04176NY

Installation of Cabin Entry Step Assembly

Current Reissued Aircraft Small Airplane Rev 05/20/2019 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

  • § 21.47
  • § 21.101
  • § 21.115
  • § 21.120
  • Sec. 23.301
  • Sec. 23.305
  • Sec. 23.321
  • Sec. 23.341
  • Sec. 23.561
  • Sec. 23.603
  • Sec. 23.605
  • Sec. 23.607
  • Sec. 23.611
  • Sec. 23.613
  • Sec. 23.621
  • Sec. 23.811
  • Sec. 23.853
  • Sec. 23.1301
  • Sec. 23.1309
  • Sec. 23.1353
  • Sec. 23.1359
  • § 23.1529

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