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

SA00002WI

Operation of airplane on unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON + MON)/2. Intermixing with aviation gasoline also approved. Held by Petersen Aviation INC, which holds 167 approved modifications in all. Last revised October 22, 1992. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division
Models
SR-5, SR-5A (Army L-12), SR-5B, SR-5C, SR-5E
Type certificates
ATC 530, ATC 530, ATC 530, ATC 530, ATC 530
On this site
Stinson SR-5 11 registered
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.