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

SR01802WI

To allow the use of UL91 or UL94 (minimum) grade aviation fuel per ASTM D7547. Held by Swift Fuels LLC, which holds 5 approved modifications in all. Last revised April 18, 2016. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Brantly International Inc.; Siam Hiller Holdings Inc.; Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation; Sikorsky Aircraft Corporation; TWMCC Leasing LLC
Models
B-2B, UH-12E, 269A-1, 269A, 269C-1, 18A
Type certificates
2H2, 4H11, 4H12, 4H12, 4H12, 1H17
On this site
Brantly B-2 53 registered
Hiller UH-12 217 registered
Hughes 269 300 series helicopters 207 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.