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

SH5758NM

Fabrication of the Onboard Model 200-095-00 Multi-Channel Electrical Slip-Ring Kit. Held by Onboard Systems International, which holds 51 approved modifications in all. Last revised October 7, 2021. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Rotorcraft Development Corporation
Models
204B, 205A, 205A-1, 212, 412, UH-1H
Type certificates
H1SW, H1SW, H1SW, H4SW, H4SW, H13WE
On this site
Bell 204 7 registered
Bell 205 58 registered
Bell 212 59 registered
Bell 412 87 registered
Bell UH-1 Huey (Iroquois) 404 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 8, 2026.