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

SR09321RC

Installation of Improved Main Rotor Grips and Matching Adapter Nut. Held by Scott'S Bell 47 INC, which holds 41 approved modifications in all. Last revised August 7, 2014. System: rotorcraft systems.

What it applies to

Kind of product
Aircraft
Design holder
Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc
Models
47, 47B, 47B3, 47D, 47D1, 47E, 47G-2, 47G-2A-1, 47G-2A, 47G-3, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-3B, 47G-4, 47G-4A, 47G-5, 47G-5A, 47G, 47H-1, 47J-2, 47J-2A, 47J, 47K
Type certificates
H-1, H-1, H-1, H-1, H-1, H-1, H-1, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, H-1, H-1, 2H1, 2H1, 2H1, 2H1
On this site
Bell-Carson 47 5 registered
Bell 47 478 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.