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Atlas / STC / SA551NE

FAA · Supplemental Type Certificate

STC SA551NE

Installation of Collins EFIS 86B(12) electronic flight instrument system, digital autopilot system, APS-85II, ADS-82 air data system and WRX-300 weather radar.

Historical Issued Aircraft Large Multi-Engine Rev 12/17/1987 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

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