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

SE4731NM

Replace fixed wastegate with a turbocharger differential pressure control system. Held by Merlyn Products INC., which holds 35 approved modifications in all. Last revised April 23, 1990. System: engine.

What it applies to

Kind of product
Engine
Design holder
Continental Motors; Continental Motors; Continental Motors; Continental Motors; Continental Motors; Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors; Teledyne Continental Motors
Models
LTSIO-360-E, LTSIO-360-EB, LTSIO-360-KB, TSIO-360-E, TSIO-360-EB, TSIO-360-KB, TSIO-360-F, TSIO-360-FB, TSIO-360-G, TSIO-360-GB, TSIO-360-LB
Type certificates
E9CE, E9CE, E9CE, E9CE, E9CE, E9CE, E9CE, E9CE, E9CE, E9CE, E9CE
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 26, 2026.