FAA · Supplemental Type Certificate
STC SA00098SE
Installation of emergency medical stretcher, oxygen, and electrical systems.
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 (10)
- 2A4 Twin Commander Aircraft LLC · 681
- 2A4 Twin Commander Aircraft LLC · 685
- 2A4 Twin Commander Aircraft LLC · 690
- 2A4 Twin Commander Aircraft LLC · 690A
- 2A4 Twin Commander Aircraft LLC · 690B
- 2A4 Twin Commander Aircraft LLC · 690C
- 2A4 Twin Commander Aircraft LLC · 690D
- 2A4 Twin Commander Aircraft LLC · 695
- 2A4 Twin Commander Aircraft LLC · 695A
- 2A4 Twin Commander Aircraft LLC · 695B
Specific sections
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗