FAA · Supplemental Type Certificate
STC SA03040CH
Installation of a digital payload hopper quantity and spray boom pressure indicating 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 (12)
- A9SW Air Tractor Inc. · AT-400
- A9SW Air Tractor Inc. · AT-400A
- A17SW Air Tractor Inc. · AT-402
- A17SW Air Tractor Inc. · AT-402A
- A17SW Air Tractor Inc. · AT-402B
- A17SW Air Tractor Inc. · AT-502
- A17SW Air Tractor Inc. · AT-502A
- A17SW Air Tractor Inc. · AT-502B
- A17SW Air Tractor Inc. · AT-504
- A19SW Air Tractor Inc. · AT-602
- A19SW Air Tractor Inc. · AT-802
- A19SW Air Tractor Inc. · AT-802A
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 ↗