FAA · Supplemental Type Certificate
STC ST01925CH
Installation of a Honeywell RESCU 406AF Emergency Locator Transmitter (ELT) System.
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 (6)
- A53EU Aerospatiale (Societe Nationale Industrielle Aerospatiale) · ATR42-200
- A53EU Aerospatiale (Societe Nationale Industrielle Aerospatiale) · ATR42-300
- A53EU Aerospatiale (Societe Nationale Industrielle Aerospatiale) · ATR42-320
- A53EU Aerospatiale (Societe Nationale Industrielle Aerospatiale) · ATR42-500
- A53EU Aerospatiale (Societe Nationale Industrielle Aerospatiale) · ATR72-202
- A53EU Aerospatiale (Societe Nationale Industrielle Aerospatiale) · ATR72-212
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 ↗