Installation of closet and windscreen.
FAA holder: Safran Cabin Inc.
Aircraft STC directory
McDonnell Douglas DC-9-31 STCs
The Jun 30, 2026 FAA DRS snapshot contains 79 selected supplemental type certificates with status Current whose public applicability data names the McDonnell Douglas DC-9-31. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
79
listed Current at snapshot
33
holder directories
11
modification categories
Jul 18, 2025
latest recorded revision
Modification demand surface
Recorded holders
ABX Air Incorporated10Amphenol Cable and Interconnect Technologies Inc.7Airborne Maintenance & Engineering Services (AMES)7B/E Aerospace4Honeywell International Inc3Aeronautical Engineers, Inc3USA Jet Airlines Inc.3Aerovias de Mexico S.A. de C.V.3Safran Cabin Inc.2American Airlines Inc2Jetaire Aerospace LLC2Ontic Engineering and Manufacturing Inc.2U.S. Technical Consultants Inc.2Avionics Group Inc.2ACSS (Aviation Communication and Surveillance Syst2Rockwell Collins Inc2Repairtech Intl2Acron Aviation Inc.1HAECO Cabin Solutions LLC1Purolator Facet, Inc1
Recently revised DC-9-31 STCs
Showing the 79 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
Installation of Flight Systems Cabin Surveillance System (CSS).
FAA holder: Acron Aviation Inc.
Installation of Rockwell Collins FPI-955 Electronic Horizontal Situation Indicators (EHSI).
FAA holder: Amphenol Cable and Interconnect Technologies Inc.
Installation of an AlliedSignal CAS-81 TCAS II System with dual AlliedSignal Mode S Transponders.
FAA holder: Amphenol Cable and Interconnect Technologies Inc.
Installation of a Rockwell Collins GNLS-910 GPS Flight Management System.
FAA holder: Amphenol Cable and Interconnect Technologies Inc.
Installation of an AlliedSignal MK-VII Enhanced Ground Proximity Warning System.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
Installation of Universal Avionics System Corporation Multi-Function Display.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
Installation of a Honeywell Enhanced Ground Proximity Warning System.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
Installation of GPS antenna provisions.
FAA holder: Amphenol Cable and Interconnect Technologies, Inc.
Installation of standard windshear systems.
FAA holder: Honeywell International Inc
Installation of Honeywell Digital air data computer (DADC).
FAA holder: Honeywell International Inc
Installation of an Intrusion/Penetration Resistance Flightdeck Door and Reinforced Flightdeck Door Surround.
FAA holder: HAECO Cabin Solutions LLC
Installation of Collins Model FPC-75 ground proximity warning system.
FAA holder: American Airlines Inc
Installation of Teledyne ARINC communications and reporting system (ACARS).
FAA holder: American Airlines Inc
Installation of an Apollo Navigation Management System (NMS).
FAA holder: ABX Air Incorporated
Installation of a Dual 20 Joule ignition system.
FAA holder: ABX Air Incorporated
Installation of dual Kollsman575-35900-A1778 mach/airspeed indicator.
FAA holder: ABX Air Incorporated
Installation of number 3 Sperry Gyro P/N 2587335-12.
FAA holder: ABX Air Incorporated
Installation of Jet standby horizon P/N 501-1568-14.
FAA holder: ABX Air Incorporated
Installation of an Innovative Solutions & Support Duplex Altimetry System.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of Smoke/Fire Detection/Suppression System, Lower Cargo Compartments.
FAA holder: Jetaire Aerospace LLC
Installation of 9g barrier net and floor modification for Type C containers.
FAA holder: Aeronautical Engineers, Inc
Installation of a roller system for Type C containers.
FAA holder: Aeronautical Engineers, Inc
Installation of type C containers.
FAA holder: Aeronautical Engineers, Inc
Installation of smoke detection system, lower cargo compartments.
FAA holder: Ontic Engineering and Manufacturing Inc.
Installation of smoke detection and fire suppression systems provisions.
FAA holder: Ontic Engineering and Manufacturing Inc.
Installation of a Universal Avionics Terrain Awareness Warning System (TAWS) and a Universal Avionics GPS-1000 Global Positioning System.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of MD-640 multi-function display.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of Honeywell Multi-Function Radar Display (MFRD).
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of Honeywell Primus 880 Digital Weather Radar System.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of a second Rockwell Collins Mode-S transponder.
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of Honeywell Enhanced Ground Proximity Warning System (EGPWS).
FAA holder: Airborne Maintenance & Engineering Services (AMES)
Installation of a GTE Airfone Digital public telephone system (Genstar).
FAA holder: U.S. Technical Consultants Inc.
Installation of Grimes floor proximity lighting system.
FAA holder: Honeywell International Inc.
Installation of a Digital Flight Data Recorder and new parameter sensors.
FAA holder: Canard Aerospace Corporation
Modification of DC-9 Tail Cone Slide Cover.
FAA holder: Northwest Airlines Inc
Installation of an Air to Ground Public Telephone Communication System (Seatfone) or the Genstar Public Telephone System.
FAA holder: U.S. Technical Consultants Inc.
Installation of Self Illuminating Floor Path Marking System.
FAA holder: Lufthansa Technik AG
Install Aircraft Braking Systems Corporation (ABSC) Nose Landing Gear Wheel Assembly 9550267-6A or 9550267-7A.
FAA holder: Aircraft Braking Systems Corporation
Installation of Ground Service Power Outlet.
FAA holder: Aerovias de Mexico S.A. de C.V.
Installation of replacement immersion heater.
FAA holder: Aircraft Food Service Equipment Repair
Installation of a Sandel Avionics ST3400 Class A Terrain Awareness and Warning System.
FAA holder: Avionics Group Inc.
Installation of Vickers engine driven hydraulic pumps.
FAA holder: Eaton Aerospace LLC
Installation of composites unlimited closets, dividers and storage units in passenger cabin.
FAA holder: Composites Unlimited Inc
Modification to provide a replacement Fairing Assembly for McDonnell Douglas P/N 5959171.
FAA holder: ASTECH Engineered Products Inc.
Installation of air to ground public telephone communication system.
FAA holder: GTE Airfone Incorporated
Installation of Honeywell Traffic Alert and Collision Avoidance System (TCAS II).
FAA holder: ACSS (Aviation Communication and Surveillance Syst
Installation of Honeywell vertical speed indicator/traffic resolution advisory (VSI/TRA) display.
FAA holder: ACSS (Aviation Communication and Surveillance Syst
Installation of Wing Anti-Ice Thermostat/Anticipator.
FAA holder: Honeywell International
Installation of replacement cooling turbine nozzle assembly.
FAA holder: Repairtech Intl