SE0417CH
Turbo-normalization. Held by Western Skyways Aircraft Modifications INC., which holds 12 approved modifications in all. Last revised October 22, 2019. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Continental Motors Inc; Continental Motors Inc; Continental Motors Inc; Continental Motors Inc; Continental Motors Inc; Continental Motors; Continental Motors; Continental Motors; Continental Motors; Continental Motors; Continental Motors
- Models
- TSIO-520-C, TSIO-520-G, TSIO-520-H, TSIO-520-M, TSIO-520-R, IO-520-A, IO-520-F, IO-520-J, IO-520-L, IO-550-F, IO-550-L
- Type certificates
- E8CE, E8CE, E8CE, E8CE, E8CE, E5CE, E5CE, E5CE, E5CE, E3SO, E3SO
- 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.