FAA · Supplemental Type Certificate
STC SA3-425
Installation of one-piece windshield, electrically heated or bird-proof.
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 (15)
- 6A2 McDonnell Douglas Corporation · R4D-8
- 6A2 McDonnell Douglas Corporation · R4D-8Z
- 6A2 McDonnell Douglas Corporation · Super DC-3
- A-618 McDonnell Douglas Corporation · DC3-G102
- A-618 McDonnell Douglas Corporation · DC3-G103A
- A-618 McDonnell Douglas Corporation · DC3-G202A Series
- A-669 McDonnell Douglas Corporation · DC-3 Series
- A-669 McDonnell Douglas Corporation · DC3A-SC3G
- A-669 McDonnell Douglas Corporation · DC3A-S1CG
- A-669 McDonnell Douglas Corporation · DC3A-S4C4G
- A-669 McDonnell Douglas Corporation · DC3C-R-1830-90C (Army C-47B)
- A-669 McDonnell Douglas Corporation · DC3C-R-1830-90C (Navy R4D-6)
- A-669 McDonnell Douglas Corporation · DC3D-R-1830-90C (Army C-117A)
- A-669 McDonnell Douglas Corporation · DC3A-S1C3G
- A-669 McDonnell Douglas Corporation · DC3A-SCG
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 ↗