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

SA10210SC

Installation of Pratt & Whitney Canada PT6A-135A engines and Hartzell HC-E4N-3N/D8990SK propellers with B. F. Goodrich electric de-ice boots. Held by Blackhawk Modifications INC., which holds 26 approved modifications in all. Last revised January 12, 2012. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Hawker Beechcraft Corporation
Models
C90
Type certificate
3A20
On this site
Beechcraft C90 King Air C90 607 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 22, 2026.