ST00250NY-D
Installation of a power conversion system. Held by Jefferson Financial CO, which holds 6 approved modifications in all. Last revised September 18, 1998. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerospatiale (Societe Nationale Industrielle Aerospatiale)
- Models
- ATR-42 Series
- Type certificate
- A53EU
- On this site
- Aerospatiale/Aeritalia ATR 42 16 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 7, 2026.