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Approved modifications · supplemental type certificate · current · amended

SA00948CH

Installation of various de-icer wire harnesses. (E90 modified by STC SA3593NM, F90 modified by STC SA4131NM, B200 modified by STC SA2698NM-S, DHC-6 Series modified by STC SA3532NM). Held by Smr Technologies INC, which holds 24 approved modifications in all. Last revised January 29, 2004. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Bombardier Inc.; Bombardier Inc.; Bombardier Inc.; Bombardier Inc.; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; Fairchild Aircraft Corporation; Fairchild Aircraft Corporation; Fairchild Aircraft Corporation; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; McCauley Propeller Systems; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Hartzell Propeller Inc.; Hartzell Propeller Inc.; Hartzell Propeller Inc.
Models
DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, T310P, 310N, 310L, 310K, E310J, 310J, 320D, 340, 320E, 320F, 401, 401B, 411A, 421B, 421A, 414, 411, 402B, 402A, 402, 401A, 421, SA227-TT, SA227-AT, SA227-AC (C-26A), 4HFR34C7( ), 4HFR34C6( ), 3AF34C(5-), 3AF32C(5-), E90, B200, 1900D, 200 (A100-1 (U-21J)), F90, HC-B3T, HC-B4TN-3, HC-B4TN-5
Type certificates
A9EA, A9EA, A9EA, A9EA, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A25, 3A25, 3A25, 3A25, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A5SW, A5SW, A8SW, P3NE, P3NE, P57GL, P57GL, 3A20, A24CE, A24CE, A24CE, A31CE, P15EA, P40EA, P40EA
On this site
Beechcraft 1900 Airliner 157 registered
Beechcraft B200 King Air B200 718 registered
Beechcraft E-90 King Air E90 146 registered
Cessna 310 1,410 registered
Cessna 320 137 registered
Cessna 340 707 registered
Cessna 401 51 registered
Cessna 402 174 registered
Cessna 411 10 registered
Cessna 414 Chancellor 605 registered
Cessna 421 Golden Eagle 769 registered
Cessna T-310 207 registered
Dehavilland DHC-6 115 registered
Fairchild SA227 87 registered
Swearingen SA227 32 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 7, 2026.