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Atlas / STC / SA271GL

FAA · Supplemental Type Certificate

STC SA271GL

Installation of Great Lakes forward windows, P/N's W-, W/T-, W/G-2058-187 or -250 and W-, W/G-20599-187 or -250.

Current Reissued Aircraft Small Multi-Engine Rev 11/26/2008 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

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