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

SH935GL

Installation of Shadin Company digital fuel flow indicator system. Held by Shadin Company INC, which holds 31 approved modifications in all. Last revised June 8, 2006. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada)
Models
222B, 222U, 230, 430
Type certificates
H9SW, H9SW, H9SW, H9SW
On this site
Bell 222 21 registered
Bell 230 13 registered
Bell 430 30 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.