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

ST01520WI

Installation of the Concorde RG-442 VRSLA Battery and Temperature Sensor in place of the original Nickel-Cadmium Battery. Held by Concorde Battery Corporation, which holds 60 approved modifications in all. Last revised November 19, 2018. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.; Embraer - Empresa Brasileira de Aeronautica S.A.
Models
EMB-135BJ, EMB-135ER, EMB-135KE, EMB-135KL, EMB-135LR, EMB-145, EMB-145EP, EMB-145ER, EMB-145LR, EMB-145MP, EMB-145MR, EMB-145XR
Type certificates
T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT
On this site
Embraer EMB-135 ERJ 135 and Legacy 119 registered
Embraer EMB-145 ERJ 145 313 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.