Supplemental type certificate · Heliarc Welding Service Inc.
- Holder
- Heliarc Welding Service Inc. · United States
- Status
- Current · Amended
- Status date
- February 4, 1985
- Applied
- June 1, 1978
- Product
- Aircraft · Small Multi-Engine
- Certification basis
- Part 21
From FAA DRS, with our copy of the certificate PDF. DRS record last changed December 6, 2025.
What it approves
Installation of exhaust stacks.
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
This certificate is a scan without a text layerOpen the PDF to read it. ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
No AD in this release names this STC Approved models · 5
| Make | Model | Data sheet |
|---|
| Cessna Aircraft Company | 411 | A7CE |
| Cessna Aircraft Company | 411A | A7CE |
| Cessna Aircraft Company | 421 | A7CE |
| Cessna Aircraft Company | 421A | A7CE |
| Cessna Aircraft Company | 421B | A7CE |