FAA-listed STC holder

Diagnostic Solution International LLC STCs

The Jun 30, 2026 FAA DRS snapshot lists 12 selected supplemental type certificates with status Current under Diagnostic Solution International LLC. The records span 31 public aircraft directories and 2 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.

listed Current at snapshot

aircraft directories

modification categories

Dec 14, 2020

latest recorded revision

Modification mix

Other aircraft modifications11 Propellers1

Aircraft represented

Bell Helicopter Textron 412282 STCs Bell Helicopter Textron Canada 206L-4276 STCs Bell Helicopter Textron Canada 407270 STCs Bell Helicopter Textron 412EP201 STCs Airbus Helicopters AS-350B2150 STCs Airbus Helicopters AS-350B1122 STCs Bell Helicopter Textron 412CF93 STCs Airbus Helicopters Deutschland GmbH EC135 P2+58 STCs Airbus Helicopters Deutschland GmbH EC135 T2+57 STCs Airbus Helicopters Deutschland GmbH MBB-BK 117 C-257 STCs Airbus Helicopters Deutschland GmbH EC135 P153 STCs Airbus Helicopters Deutschland GmbH EC135 T152 STCs Airbus Helicopters Deutschland GmbH EC135P329 STCs Airbus Helicopters Deutschland GmbH MBB-BK 117 C-129 STCs Airbus Helicopters Deutschland GmbH EC135T328 STCs Airbus Helicopters AS-365N227 STCs De Havilland Aircraft of Canada DHC-8-10226 STCs De Havilland Aircraft of Canada DHC-8-10326 STCs De Havilland Aircraft of Canada DHC-8-10626 STCs De Havilland Aircraft of Canada DHC-8-20226 STCs

Recently revised records

Showing the 12 most recently revised records. Category directories provide the complete paginated discovery path.

12 displayed records.

Search every indexed record for this holder. The table below contains the recently revised records shown on this page.

Diagnostic Solution International LLC supplemental type certificates, aircraft applicability, source status and dates
STC and modification	Aircraft / model / TC	Source status and dates	Holder and authority
SR01591NY-D Installation of a Chadwick-Helmuth Vibration Monitoring System, VXP. Other aircraft modifications View record	Bell Helicopter Textron 412TC H4SW Bell Helicopter Textron 412CFTC H4SW Bell Helicopter Textron 412EPTC H4SW	Current at cited snapshot Revised Dec 14, 2020 Application: Jun 13, 2003	FAA holder: Diagnostic Solution International LLC FAA authority record
SR01613NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Bell Helicopter Textron Canada 407TC H2SW	Current at cited snapshot Revised Dec 14, 2020 Application: Apr 19, 2004	FAA holder: Diagnostic Solution International LLC FAA authority record
SR01935NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Bell Textron Canada 427TC R00001RC	Current at cited snapshot Revised Dec 14, 2020 Application: Oct 19, 2004	FAA holder: Diagnostic Solution International LLC FAA authority record
SR01949NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Airbus Helicopters AS-365N2TC H10EU Airbus Helicopters AS-365N3TC H10EU Airbus Helicopters SA-365N1TC H10EU	Current at cited snapshot Revised Dec 14, 2020 Application: Nov 30, 2004	FAA holder: Diagnostic Solution International LLC FAA authority record
SR01970NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Leonardo Spa A109ETC H7EU	Current at cited snapshot Revised Dec 14, 2020 Application: Oct 19, 2004	FAA holder: Diagnostic Solution International LLC FAA authority record
SR01972NY-D Installation of a Honeywell Chadwick Model 15175 VXP system. Other aircraft modifications View record	Bell Helicopter Textron (Canada) 206L-4TC H2SW	Current at cited snapshot Revised Dec 14, 2020 Application: Oct 19, 2004	FAA holder: Diagnostic Solution International LLC FAA authority record
SR02114NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Airbus Helicopters Deutschland GmbH EC135 P1TC H88EU Airbus Helicopters Deutschland GmbH EC135 P2TC H88EU Airbus Helicopters Deutschland GmbH EC135 T1TC H88EU Airbus Helicopters Deutschland GmbH EC135 T2TC H88EU Airbus Helicopters Deutschland GmbH EC135P3TC H88EU Airbus Helicopters Deutschland GmbH EC135T3TC H88EU Airbus Helicopters Deutschland GmbH EC635T2+TC H88EU	Current at cited snapshot Revised Dec 14, 2020 Application: Jan 27, 2006	FAA holder: Diagnostic Solution International LLC FAA authority record
SR02120NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Leonardo Spa AB139TC R00002RD	Current at cited snapshot Revised Dec 14, 2020 Application: Jul 7, 2006	FAA holder: Diagnostic Solution International LLC FAA authority record
ST00782LA Installation of Chadwick Helmuth Propeller Balance Monitoring System (Vibration Management System II, VMS II). Propellers View record	De Havilland Aircraft of Canada DHC-8-101TC A13NM De Havilland Aircraft of Canada DHC-8-102TC A13NM De Havilland Aircraft of Canada DHC-8-103TC A13NM De Havilland Aircraft of Canada DHC-8-106TC A13NM De Havilland Aircraft of Canada DHC-8-201TC A13NM De Havilland Aircraft of Canada DHC-8-202TC A13NM De Havilland Aircraft of Canada DHC-8-301TC A13NM De Havilland Aircraft of Canada DHC-8-311TC A13NM De Havilland Aircraft of Canada DHC-8-315TC A13NM	Current at cited snapshot Revised Dec 14, 2020 Application: Feb 9, 1999	FAA holder: Diagnostic Solution International LLC FAA authority record
SR01957NY-D Installation of a Honeywell Chadwick Model 15175 VXP System. Other aircraft modifications View record	Bell Textron Canada 430TC H9SW	Current at cited snapshot Revised Mar 24, 2020 Application: Oct 19, 2004	FAA holder: Diagnostic Solution International LLC FAA authority record
SR02630LA Installation of Honeywell Model 15175VXP Health Monitoring System. Other aircraft modifications View record	Airbus Helicopters AS-350B1TC H9EU Airbus Helicopters AS-350B2TC H9EU	Current at cited snapshot Revised Mar 15, 2017 Application: Jun 19, 2014	FAA holder: Diagnostic Solution International LLC FAA authority record
SR02535LA Installation of Honeywell Model 15175 VXP Health Monitoring System. Other aircraft modifications View record	Airbus Helicopters Deutschland GmbH MBB-BK 117 C-1TC H13EU Airbus Helicopters Deutschland GmbH MBB-BK 117 C-2TC H13EU	Current at cited snapshot Revised May 28, 2015 Application: Dec 23, 2013	FAA holder: Diagnostic Solution International LLC FAA authority record