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

SP00922CH

Installation of various SMR Technologies electrical propeller de-icer models. (RHFR34C6( ) 53/L106FA-0) (HC-B4T N-5ML/LT10574). Held by Smr Technologies, which holds 34 approved modifications in all. Last revised July 25, 2002. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
British Aerospace (Scotland); Dornier-Werke G.m.b.H.; Dornier-Werke G.m.b.H.; Dornier-Werke G.m.b.H.; Dornier-Werke G.m.b.H.; Dornier-Werke G.m.b.H.; Dornier-Werke G.m.b.H.; Hartzell Propeller Inc.; Jetstream Aircraft Limited; McCauley Propeller Systems
Models
Jetstream Model 3201, Do 228-212, Do 228-202, Do 228-201, Do 228-100, Do 228-101, Do 228-200, HC-B4T, Jetstream Model 4101, 4HFR34C6( )
Type certificates
A56EU, A16EU, A16EU, A16EU, A16EU, A16EU, A16EU, P40EA, A41NM, P3NE
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 7, 2026.