SA7831SW
Installation of dual Marathon TSP-280 nickel cadmium batteries. Held by Marathon Power Tech CO, which holds 11 approved modifications in all. Last revised May 19, 1994. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- RUAG Aerospace Services GmbH; RUAG Aerospace Services GmbH; RUAG Aerospace Services GmbH; RUAG Aerospace Services GmbH; RUAG Aerospace Services GmbH
- Models
- Dornier 228-100, Dornier 228-101, Dornier 228-200, Dornier 228-201, Dornier 228-202
- Type certificates
- A16EU, A16EU, A16EU, A16EU, A16EU
- On this site
- Dornier DORNIER 228 11 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.