SA4340NM
Installation of a PT-6A-20 engine ont he left side and a PT-6A-6A on the right side, each installed per instructions of STC SA1016WE. Held by Methow Aviation INC, which holds 2 approved modifications in all. Last revised August 4, 1988. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Hawker Beechcraft Corporation; Hawker Beechcraft Corporation
- Models
- B90, E18S
- Type certificates
- 3A20, A-765
- On this site
- Beechcraft B90 29 registered
Beechcraft E18 58 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.