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

SR01745LA

One-time STC to install a hand control device for the anti-torque pedal control on Bell 47J-2A, serial number 3305. Held by Chap J, which holds 2 approved modifications in all. Last revised March 22, 2005. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Bell Helicopter Textron
Models
47J-2A
Type certificate
2H1
On this site
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.