SA8515SW-D
Installation of a Century automatic flight system. (OTTER DHC-3 (U-1A) gross weight increase to 8367 lb gross weight). Held by Century Flight Systems INC, which holds 765 approved modifications in all. Last revised April 28, 1997. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bombardier-Rotax GmbH
- Models
- Otter DHC-3 (U-1A)
- Type certificate
- A-815
- 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 5, 2026.