SA2040NMOther aircraft modifications
Installation of closet and windscreen.
FAA holder: Safran Cabin Inc.
Aircraft STC directory
McDonnell Douglas DC-9-34 STCs
The Jun 30, 2026 FAA DRS snapshot contains 57 selected supplemental type certificates with status Current whose public applicability data names the McDonnell Douglas DC-9-34. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
57
listed Current at snapshot
27
holder directories
9
modification categories
Jul 18, 2025
latest recorded revision
Modification demand surface
Other aircraft modifications25
Avionics11
Aircraft structures7
Safety and emergency equipment5
Cabin and interiors3
Aircraft connectivity3
Fuel systems1
Landing gear and brakes1
Engine and powerplant1
Recorded holders
Amphenol Cable and Interconnect Technologies Inc.6ABX Air Incorporated6Airborne Maintenance & Engineering Services (AMES)6Honeywell International Inc3Aeronautical Engineers, Inc3Safran Cabin Inc.2USA Jet Airlines Inc.2Avionics Group Inc.2B/E Aerospace2ACSS (Aviation Communication and Surveillance Syst2Rockwell Collins Inc2Acron Aviation Inc.1HAECO Cabin Solutions LLC1Purolator Facet, Inc1BF Goodrich Aerospace1Teledyne Controls1Canard Aerospace Corporation1Northwest Airlines Inc1U.S. Technical Consultants Inc.1Lufthansa Technik AG1
Recently revised DC-9-34 STCs
Showing the 57 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
ST01518NYCabin and interiors
Installation of Flight Systems Cabin Surveillance System (CSS).
FAA holder: Acron Aviation Inc.
ST00984CHOther aircraft modifications
Installation of Rockwell Collins FPI-955 Electronic Horizontal Situation Indicators (EHSI).
FAA holder: Amphenol Cable and Interconnect Technologies Inc.
ST01019CHAvionics
Installation of a Rockwell Collins GNLS-910 GPS Flight Management System.
FAA holder: Amphenol Cable and Interconnect Technologies Inc.
ST01167CHSafety and emergency equipment
Installation of an AlliedSignal MK-VII Enhanced Ground Proximity Warning System.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
ST01404CHAvionics
Installation of Universal Avionics System Corporation Multi-Function Display.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
ST01818CHSafety and emergency equipment
Installation of a Honeywell Enhanced Ground Proximity Warning System.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
ST01887CHAircraft connectivity
Installation of GPS antenna provisions.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
SA4817NMOther aircraft modifications
Installation of standard windshear systems.
FAA holder: Honeywell International Inc
SA8047NMOther aircraft modifications
Installation of Honeywell Digital air data computer (DADC).
FAA holder: Honeywell International Inc
ST02463ATAircraft structures
Installation of an Intrusion/Penetration Resistance Flightdeck Door and Reinforced Flightdeck Door Surround.
FAA holder: HAECO Cabin Solutions LLC
SA2991SOOther aircraft modifications
Installation of a replacement coalescer filter, P/N 21D10 or 21D10-1, or 21BC125..
FAA holder: Purolator Facet, Inc
ST00974CHAvionics
Installation of provisions for an Automatic Dependent Surveillance Broadcast (ADS-B) System to provide Cockpit Display of Traffic Information (CDTI).
FAA holder: ABX Air Incorporated
SA1659GLOther aircraft modifications
Installation of Kollsman P/N A4289-10-215 Captain's altimeter, P/N 518-28007-201 first officer's altimeter, P/N 540-23989-001 altitude alerter.
FAA holder: ABX Air Incorporated
SA1668GLOther aircraft modifications
Installation of number 3 Sperry Gyro P/N 2587335-12.
FAA holder: ABX Air Incorporated
SA1669GLOther aircraft modifications
Installation of Jet standby horizon P/N 501-1568-14.
FAA holder: ABX Air Incorporated
ST01304LAOther aircraft modifications
Installation of BF Goodrich Lighting Systems Fixed Wingtip Navigational Lighting System in accordance with FAA approved BF Goodrich Aerospace Master Drawing List, BFG-R-351-00, Revision N/C , Dated June 15, 2000, or later FAA approved revisions.
FAA holder: BF Goodrich Aerospace
ST01777CHOther aircraft modifications
Installation of an Innovative Solutions & Support Duplex Altimetry System.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
ST02243LAOther aircraft modifications
Installation of Teledyne Controls Wireless Ground Link - Quick Access REcorder (WQAR).
FAA holder: Teledyne Controls
ST01653CHAircraft structures
Installation of an Auxiliary Power Unit Door Actuator System.
FAA holder: Woodward MPC
SA1893SOAircraft structures
Installation of 9g barrier net and floor modification for Type C containers.
FAA holder: Aeronautical Engineers, Inc
SA1894SOOther aircraft modifications
Installation of a roller system for Type C containers.
FAA holder: Aeronautical Engineers, Inc
SA1895SOOther aircraft modifications
Installation of type C containers.
FAA holder: Aeronautical Engineers, Inc
ST02009CHAvionics
Installation of MD-640 multi-function display.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
ST02025CHAvionics
Installation of Honeywell Multi-Function Radar Display (MFRD).
FAA holder: Airborne Maintenance & Engineering Services (AMES)
ST02026CHAvionics
Installation of Honeywell Primus 880 Digital Weather Radar System.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
ST02027CHAvionics
Installation of a second Rockwell Collins Mode-S transponder.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
ST02028CHSafety and emergency equipment
Installation of Honeywell Enhanced Ground Proximity Warning System (EGPWS).
FAA holder: Airborne Maintenance & Engineering Services (AMES)
SA1785GLOther aircraft modifications
Installation of a Stage 3 Hushkit on McDonnell Douglas DC-9-31, -32, -32F, -33F, -34, -34F, -41 with: (1) Pratt & Whitney JT8D-9, -11, -15, -17 series engines.
FAA holder: USA Jet Airlines Inc.
ST165CHOther aircraft modifications
Fabrication and installation of a Stage 3 hushkit when powered by Pratt & Whitney JT8D-7, -9, or -11, -15, or -17 series engines.
FAA holder: USA Jet Airlines Inc.
SA1044GLAircraft structures
Installation of Grimes floor proximity lighting system.
FAA holder: Honeywell International Inc.
ST01066CHOther aircraft modifications
Installation of a Digital Flight Data Recorder and new parameter sensors.
FAA holder: Canard Aerospace Corporation
ST01967CHOther aircraft modifications
Modification of DC-9 Tail Cone Slide Cover.
FAA holder: Northwest Airlines Inc
SA1467GLAircraft connectivity
Installation of an Air to Ground Public Telephone Communication System (Seatfone) or the Genstar Public Telephone System.
FAA holder: U.S. Technical Consultants Inc.
ST02274NYAircraft structures
Installation of Self Illuminating Floor Path Marking System.
FAA holder: Lufthansa Technik AG
ST02062CHLanding gear and brakes
Install Aircraft Braking Systems Corporation (ABSC) Nose Landing Gear Wheel Assembly 9550267-6A or 9550267-7A.
FAA holder: Aircraft Braking Systems Corporation
ST01562LAOther aircraft modifications
Installation of Ground Service Power Outlet.
FAA holder: Aerovias de Mexico S.A. de C.V.
ST350CHOther aircraft modifications
Installation of replacement immersion heater.
FAA holder: Aircraft Food Service Equipment Repair
ST02998ATAvionics
Installation of a Sandel Avionics ST3400 Class A Terrain Awareness and Warning System.
FAA holder: Avionics Group Inc.
ST01867CHEngine and powerplant
Installation of Vickers engine driven hydraulic pumps.
FAA holder: Eaton Aerospace LLC
SA8028NMOther aircraft modifications
Installation of replacement trash containers.
FAA holder: HST Inc.
ST735SOSafety and emergency equipment
Installation of protective rigid cover over the tail cone emergency evacuation slide.
FAA holder: Derlan Inc
ST00712LAOther aircraft modifications
Modification to provide a replacement Fairing Assembly for McDonnell Douglas P/N 5959171.
FAA holder: ASTECH Engineered Products Inc.
SA924GLAircraft connectivity
Installation of air to ground public telephone communication system.
FAA holder: GTE Airfone Incorporated
ST01458ATCabin and interiors
Installation of G1 galley, P/N 53801000-1 per master drawing list 53801.
FAA holder: B/E Aerospace
SA4853NMOther aircraft modifications
Installation of Honeywell Traffic Alert and Collision Avoidance System (TCAS II).
FAA holder: ACSS (Aviation Communication and Surveillance Syst
SA4878NMAvionics
Installation of Honeywell vertical speed indicator/traffic resolution advisory (VSI/TRA) display.
FAA holder: ACSS (Aviation Communication and Surveillance Syst
SA2823CEOther aircraft modifications
Installation of Collins Traffic Alert and Collision avoidance systemTTR-920 (TCAS II).
FAA holder: Rockwell Collins Inc
SA614GLSafety and emergency equipment
Installation of B.F. Goodrich TSO-C69 emergency evacuation slide P/N 7A1276 Series.
FAA holder: Goodrich Corporation
ST02269ATOther aircraft modifications
To upgrade the number of required parameters to be recorded by existing (Sundstrand/AlliedSignal 980-4100-( ) and 980-4120-( ) or Fairchild/Loral 17M703-274 and 17M903-274) flight data recorder.
FAA holder: Avionics Group Inc.
ST09831SCAircraft structures
Installation of Wing Anti-Ice Thermostat/Anticipator.
FAA holder: Honeywell International
SA8024NMOther aircraft modifications
Installation of replacement air cycle machine nozzle assembly.
FAA holder: Repairtech Intl