ST00423WI
Installation of Keddeg Company 21BC111 Coalescer Assembly. Held by Purolator Facet, INC, which holds 26 approved modifications in all. Last revised October 19, 2017. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Short Brothers PLC; Short Brothers PLC; Viking Air Limited; Viking Air Limited; Viking Air Limited; Viking Air Limited; Viking Air Limited
- Models
- SD3-30, SD3-60, DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103
- Type certificates
- A41EU, A41EU, A20EA, A20EA, A20EA, A20EA, A20EA
- On this site
- Dehavilland DHC-7 7 registered
Short Bros SD3 41 registered
Short Brothers Plc SD3 6 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.