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

SH286GL

Install Norton Co. radome P/N AD-4082X-2 (Sikorsky P/N76600-02110-101) in accordance with Norton radome P/N AD-4082X-10(Sikorsky P/N 76600-02110-102). Held by Norton Company, Performance Plactics, which holds 62 approved modifications in all. Last revised June 29, 1983. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Sikorsky Aircraft Corporation
Models
S-76A
Type certificate
H1NE
On this site
Sikorsky Aircraft Corp S-76 34 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 20, 2026.