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

SE5141NM

Installation of the SOL 3503 exhaust gasket. Held by Sol Company. Last revised October 19, 1999. System: engine.

What it applies to

Kind of product
Engine
Design holder
Pratt & Whitney Division
Models
Wasp Jr. Series
Type certificate
E-123
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 7, 2026.