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

SE2529NM

Installation of an air to air intercooler in the engine induction system downstream of the turbocharger. Held by Western Skyways Aircraft Modifications INC., which holds 12 approved modifications in all. Last revised March 8, 2023. System: engine.

What it applies to

Kind of product
Engine
Design holder
Continental Aerospace Technologies Inc.; Continental Aerospace Technologies Inc.
Models
TSIO-520-P, TSIO-520-AF
Type certificates
E8CE, E8CE
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.