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

SE00187WI

Add the following approved fuel: Unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON+MON)/2. Held by Petersen Aviation INC, which holds 167 approved modifications in all. Last revised August 11, 1994. System: engine.

What it applies to

Kind of product
Engine
Design holder
Gladden Products Corp.; Gladden Products Corp.; Gladden Products Corp.
Models
Kinner R-5 Series 2, Kinner R-55, Kinner R-56
Type certificates
TC 153, TC 153, TC 153
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.