SA4375NM
Installation of EDO Model 7490 Amphibious Floats and EDO Model 7170 Seaplane Floats. (OTTER DHC-3 (U-1A) normal category as modified by STC SA3777NM). Held by Luton A M. Last revised June 20, 1994. System: airframe structure.
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 20, 2026.