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

SH1030NE

Installation of Litton Special Devices Turbine Outlet Temperature (TOT) Indicator P/N s 94291001-02, -03, -04, -11 thru -15, or -31 thru -35. Held by Litton Special Devices. Last revised May 29, 2008. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada); Bell Helicopter Textron (Canada)
Models
206L-3, 206B, 206L-1, 206L-4, 206L
Type certificates
H2SW, H2SW, H2SW, H2SW, H2SW
On this site
Bell 206 JetRanger and LongRanger 1,455 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 21, 2026.