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

SH2763SO

Installation of control rotor safety cable. Held by Jaars INC., which holds 20 approved modifications in all. Last revised April 27, 1990. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Hiller Aviation; Rogerson Hiller Corporation; Rogerson Hiller Corporation
Models
UH-12D (Army UH-23D), UH-12E, Army OH-23G
Type certificates
4H10, 4H11, 4H11
On this site
Hiller UH-12 217 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 7, 2026.