Skip to content

Atlas / STC / SA1-338

FAA · Supplemental Type Certificate

STC SA1-338

Underseat radar scope mounts for: RCA 5-inch AVQ-50, Collins 4-inch WP-103, and RCA 5-inch AVQ-55/AVQ-20.

Current Issued Aircraft Small Multi-Engine Rev 06/05/1970 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 ↗