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

SA02653CH

Installation of C&D Associates Combustion Heater Kit 31, and optional ram air kit. Held by Hartzell Engine Technologies, LLC, which holds 45 approved modifications in all. Last revised February 11, 2016. System: heating, ice protection and utility systems.

What it applies to

Kind of product
Aircraft
Design holder
Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation
Models
99, A99, B99
Type certificates
A14CE, A14CE, A14CE
On this site
Beechcraft 99 Airliner 34 registered
Beechcraft B-99 6 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.