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

SR04347CH

Installation of Heli-Preheat Kit, P/N TA3195-1 for 115-volt application. Held by Hartzell Propeller LLC, which holds 16 approved modifications in all. Last revised March 25, 2024. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
MD Helicopters LLC
Models
MD900
Type certificate
H19NM
On this site
Md Helicopters Inc MD 900 11 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 5, 2026.