The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SA3780WE

Installation of Continental IO-502-K engine, Hartzell propellers,and associated installation components. Held by Air Repair, which holds 4 approved modifications in all. Last revised November 29, 1978. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Bellanca Aircraft Corporation
Models
17-30
Type certificate
1A3
On this site
Bellanca 17 Viking 628 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 5, 2026.