SA04559NY
Installation of Single or Dual Sandel SN4500 Primary Navigation Display(s) (EHSI) with optional SA4550\nprimary attitude display(s) (EADI). Held by Rocky Mountain Aircraft (Canada), which holds 35 approved modifications in all. Last revised November 9, 2020. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Viking Air Limited; Viking Air Limited; Viking Air Limited
- Models
- DHC-6-100, DHC-6-200, DHC-6-300
- Type certificates
- 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 20, 2026.