SA10341SC
Installation of Pratt & Whitney Canada PT6A-135A engines and/or Hartzell four bladed HC-D4N-3C/D9290(S,K) or HCE4N- 3N/D8990S(K) propellers. Held by Blackhawk Modifications INC., which holds 26 approved modifications in all. Last revised January 30, 2015. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation
- Models
- C90, C90A, E90
- Type certificates
- 3A20, 3A20, 3A20
- On this site
- Beechcraft C90 King Air C90 607 registered
Beechcraft E-90 King Air E90 146 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.