SA428NW
Installation of a water rudder steering system controlled by tail wheel steering bellcrank on float pline. Held by Kenmore Air Harbor LLC, which holds 56 approved modifications in all. Last revised April 5, 2019. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Viking Air Limited; Viking Air Limited
- Models
- DHC-2 Mk.I, DHC-2 Mk.III
- Type certificates
- A-806, A-806
- On this site
- Dehavilland DHC-2 254 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 7, 2026.