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

ST01619CH

Installation of a Lavatory Service Shutoff Valve. Held by Aerocontrolex Group Transdigm INC., which holds 4 approved modifications in all. Last revised March 7, 2013. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; KDC-10); The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; Bombardier Inc.; Bombardier Inc.; Bombardier Inc.; Bombardier Inc.; Bombardier Inc.; Bombardier Inc.; 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.; Embraer - Empresa Brasileira de Aeronautica S.A.
Models
737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series, 757-200 Series, 757-300 Series, DC-10-30F (KC-10A), A6WE, DC-9-15, DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88, MD-90-30, CL-600-2B19 (Regional Jet Series 100), CL-600-2B19 (Regional Jet Series 440), CL-600-2C10 (Regional Jet Series 700), CL-600-2C10 (Regional Jet Series 701), CL-600-2C10 (Regional Jet Series 702), CL-600-2D24 (Regional Jet Series 900), EMB-135BJ (Legacy 600), EMB-135BJ (Legacy 650), EMB-135ER, EMB-135KE, EMB-135KL, EMB-135LR, EMB-145, EMB-145EP,...
Type certificates
A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A2NM, A2NM, A22WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A21EA, A21EA, A21EA, A21EA, A21EA, A21EA, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT, T00011AT
On this site
Boeing 737 2,892 registered
Boeing 757 440 registered
Bombardier CL-600 Challenger and CRJ 1,656 registered
Douglas DC-9 7 registered
Embraer EMB-135 ERJ 135 and Legacy 118 registered
Embraer EMB-145 ERJ 145 313 registered
Mcdonnell Douglas Aircraft Co MD-88 10 registered
Mcdonnell Douglas DC-9 93 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 20, 2026.