SA04587NY
Installation of Acorn Welding C6SC1107-NG Exhaust stacks. Held by Acorn Welding LTD. (Canada), which holds 6 approved modifications in all. Last revised October 28, 2021. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Viking Air Limited; Viking Air Limited; Viking Air Limited; Viking Air Limited
- Models
- DHC-6-100, DHC-6-200, DHC-6-300, DHC-6-400
- Type certificates
- A9EA, A9EA, A9EA, A9EA
- On this site
- Dehavilland DHC-6 114 registered
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 21, 2026.