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Type Record · As of May 3, 2026

DOUGLAS DC-9-33F

Fixed Wing Multi Engine · P & W JT8D-9A

Registered

1

Year Range

1970–1970

NTSB Events

0

Airworthiness Directives

50

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered DOUGLAS DC-9-33F aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • AK 100.0% 1

By Decade of Manufacture

  • 1970s 100.0% 1

02 /  NTSB Records

Events involving DOUGLAS DC-9-33F aircraft

No NTSB-recorded events match DOUGLAS DC-9-33F in the indexed corpus.

03 /  Airworthiness Directives

FAA directives applicable to DOUGLAS DC-9-33F

50 directive(s) on file. Showing the most recent 25 · 25 more in the Federal Register.

  • Feb 17, 2016

    Airworthiness Directives; The Boeing Company Airplanes

    We are superseding Airworthiness Directive (AD) 2012-18-05 for The Boeing Company Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9- 50 series airplanes; and Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9- 83 (MD-83), DC-9-87 (MD-87), MD-88, and MD-90-30 airplanes; equipped with a center wing fuel tank and Boeing origi…

  • Nov 6, 2014

    Airworthiness Directives; The Boeing Company Airplanes

    We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9- 50 series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the bulkhead dome tees, which connect the bulkhead web to the fuselage, ar…

  • Nov 6, 2014

    Airworthiness Directives; The Boeing Company Airplanes

    We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-20, and DC-9-30 series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the improved (shot-peened) aft fuselage non-ventral pressure bulkhead tee is subject to wides…

  • May 29, 2014

    Airworthiness Directives; The Boeing Company Airplanes

    We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-20, and DC-9-30 series airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that the improved (shot-peened) aft fuselage non-ventral pressure bulkhead tee is sub…

  • Apr 17, 2014

    Airworthiness Directives; the Boeing Company Airplanes

    We propose to adopt a new airworthiness directive (AD) for certain the Boeing Company Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 series airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that the bulkhead dome tees, which connect the bulkhead web to the…

  • Dec 27, 2013

    Airworthiness Directives; The Boeing Company Airplanes

    We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-10, DC-9-30, and DC-9-40 series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the aft pressure bulkhead web area is subject to widespread fatigue damage (WFD). This AD req…

  • Dec 7, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, DC-9-40, and DC-9-50 Series Airplanes, Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) Airplanes, and Model MD-88 and MD-90-30 Airplanes

    We are adopting a new airworthiness directive (AD) for the McDonnell Douglas Corporation airplanes listed above. This AD requires modifying the fuel boost pumps for the center wing, and forward or aft auxiliary fuel tanks. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD t…

  • Nov 9, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    We are superseding an existing airworthiness directive (AD) for the products listed above. That AD currently requires repetitive high frequency eddy current inspections to detect cracking in the vertical radius (also known as the "vertical leg") of the upper cap of the center wing rear spar, and repair if necessary. T…

  • Oct 8, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require installing new in-line fuses for the fuel level float switch and new in-line fuses for the pressure switch, as applicable, and changing the wiring. The proposed actions would affect the left and right w…

  • Aug 5, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Model DC-9-14 and DC-9-15 airplanes; and Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 series airplanes. The existing AD currently requires repetitive high frequency eddy current inspections to detect cracking in the vertical…

  • Aug 5, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-10 Series Airplanes, DC-9-30 Series Airplanes, DC-9-81 (MD-81) Airplanes, DC-9-82 (MD-82) Airplanes, DC-9-83 (MD-83) Airplanes, DC-9-87 (MD-87) Airplanes, MD-88 Airplanes, and MD-90-30 Airplanes, Equipped With Flight Deck Doors Installed in Accordance With Supplemental Type Certificate ST02463AT

    The FAA is revising an existing airworthiness directive (AD), which applies to all McDonnell Douglas Model DC-9-10 series airplanes, DC-9-30 series airplanes, DC-9-81 (MD-81) airplanes, DC-9-82 (MD-82) airplanes, DC-9-83 (MD-83) airplanes, DC-9-87 (MD-87) airplanes, MD-88 airplanes, and MD-90-30 airplanes. That AD cur…

  • Jul 1, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-10 Series Airplanes, DC-9-30 Series Airplanes, DC-9-81 (MD-81) Airplanes, DC-9-82 (MD-82) Airplanes, DC-9-83 (MD-83) Airplanes, DC-9-87 (MD-87) Airplanes, MD-88 Airplanes, and MD-90-30 Airplanes

    This document publishes in the Federal Register an amendment adopting airworthiness directive (AD) 2009-15-16 that was sent previously to all known U.S. owners and operators of the McDonnell Douglas Corporation airplanes identified above by individual notices. This AD requires modifying the flight deck door. This AD i…

  • May 17, 2010

    Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    We are adopting a new airworthiness directive (AD) for certain Model DC-9-30, DC-9-40, and DC-9-50 series airplanes. This AD requires inspecting to determine the part numbers of the forward and aft auxiliary tank fuel boost and transfer pump conduit/conduit assembly and conduit assembly electrical connector, as applic…

  • Jan 20, 2010

    Airworthiness Directives; AVOX Systems and B/E Aerospace Oxygen Cylinder Assemblies, as Installed on Various Transport Airplanes

    The FAA is revising an existing airworthiness directive (AD), which applies to certain AVOX Systems and B/E Aerospace oxygen cylinder assemblies, as installed on various transport airplanes. That AD currently requires removing certain oxygen cylinder assemblies from the airplane. This AD removes certain oxygen cylinde…

  • Jan 19, 2010

    Airworthiness Directives; Sicma Aero Seat 88xx, 89xx, 90xx, 91xx, 92xx, 93xx, 95xx, and 96xx Series Passenger Seat Assemblies, Installed on Various Transport Category Airplanes

    We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the uns…

  • Dec 4, 2009

    Airworthiness Directives; McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and McDonnell Douglas Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    The FAA is superseding an existing airworthiness directive (AD) that applies to all McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F airplanes; and McDonnell Douglas Model DC-9-20, DC-9-30, DC-9- 40, and DC-9-50 series airplanes. That AD currently requires repetitive inspections for cracks of the main landing ge…

  • Dec 2, 2009

    Airworthiness Directives; AVOX Systems and B/E Aerospace Oxygen Cylinder Assemblies, as Installed on Various Transport Airplanes

    We are adopting a new airworthiness directive (AD) for certain AVOX Systems and B/E Aerospace oxygen cylinder assemblies, as installed on various transport airplanes. This AD requires removing certain oxygen cylinder assemblies from the airplane. This AD was prompted by the reported rupture of a high-pressure gaseous…

  • Aug 12, 2009

    Airworthiness Directives; McDonnell Douglas Model DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    We propose to adopt a new airworthiness directive (AD) for certain McDonnell Douglas Model DC-9-30, DC-9-40, and DC-9-50 series airplanes. This proposed AD would require inspecting to determine the part numbers of the forward and aft auxiliary tank fuel boost and transfer pump conduit/conduit assembly and conduit asse…

  • Jul 30, 2009

    Airworthiness Directives; McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and McDonnell Douglas Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    The FAA proposes to supersede an existing airworthiness directive (AD) that applies to all McDonnell Douglas Model DC-9-14, DC- 9-15, and DC-9-15F airplanes; and McDonnell Douglas Model DC-9-20, DC- 9-30, DC-9-40, and DC-9-50 series airplanes. The existing AD currently requires repetitive inspections for cracks of the…

  • Feb 24, 2009

    Airworthiness Directives; McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    We are adopting a new airworthiness directive (AD) for certain McDonnell Douglas airplanes listed above. This AD requires installing a dam assembly for the container of the fuel boost pump of the center tank located in the right main tank, and doing the related investigative actions, and corrective actions if necessar…

  • Dec 3, 2008

    Airworthiness Directives; McDonnell Douglas Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes, Equipped With a Tail Cone Evacuation Slide Container Installed in Accordance With Supplemental Type Certificate (STC) ST735SO

    We are adopting a new airworthiness directive (AD) for McDonnell Douglas Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 series airplanes, equipped with tail cone evacuation slide containers as specified above. This AD requires modifying the tail cone slide. This AD also requires additional tail cone drops and s…

  • Oct 22, 2008

    Airworthiness Directives; Various Transport Category Airplanes Equipped With Auxiliary Fuel Tanks Installed in Accordance With Certain Supplemental Type Certificates

    We are adopting a new airworthiness directive (AD) for various transport category airplanes. This AD requires deactivation of PATS Aircraft, LLC, auxiliary fuel tanks. This AD results from fuel system reviews conducted by the manufacturer, which identified unsafe conditions for which the manufacturer has not provided…

  • Aug 29, 2008

    Airworthiness Directives; McDonnell Douglas Model DC-9-30, DC-9-40, and DC-9-50 Series Airplanes, Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) Airplanes, and Model MD-88 and MD-90-30 Airplanes

    We propose to adopt a new airworthiness directive (AD) for the McDonnell Douglas airplanes listed above. This proposed AD would require modifying the fuel boost pumps for the center wing, and forward or aft auxiliary fuel tanks. This proposed AD results from fuel system reviews conducted by the manufacturer. We are pr…

  • Aug 1, 2008

    Airworthiness Directives; McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes, and DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

    We propose to adopt a new airworthiness directive (AD) for certain McDonnell Douglas airplanes listed above. This proposed AD would require installing a dam assembly for the container of the fuel boost pump of the center tank located in the right main tank, and doing the related investigative actions, and corrective a…

  • May 29, 2008

    Airworthiness Directives; McDonnell Douglas Model 717-200 Airplanes; Model DC-9-10 Series Airplanes; Model DC-9-20 Series Airplanes; Model DC-9-30 Series Airplanes; Model DC-9-40 Series Airplanes; Model DC-9-50 Series Airplanes; Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) Airplanes; Model MD-88 Airplanes; and Model MD-90-30 Airplanes

    We are adopting a new airworthiness directive (AD) for all McDonnell Douglas airplanes identified above. This AD requires revising the FAA-approved maintenance program, or the Airworthiness Limitations (AWLs) section of the Instructions for Continued Airworthiness, as applicable, to incorporate new AWLs for fuel tank…

07 /  PMA replacement parts

FAA-approved replacement parts for DOUGLAS DC-9-33F

60+ parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.

  • P-1013#https://drs.faa.gov/browse/excelExternalWindow/2179D15187CE02D486257B4000546D0C.0001##

    Element Assembly

    Western Filter A Division of Donalson Company Inc replaces 663180-2

    PMA holder →
  • P-1013#https://drs.faa.gov/browse/excelExternalWindow/D84557611E1232D6862570AD0064B374.0001##

    Element Assembly

    Western Filter A Division of Donalson Company Inc replaces 663180-2

    PMA holder →
  • P-1013#https://drs.faa.gov/browse/excelExternalWindow/13E47B8073AF3FA386257348005BF856.0001##

    Element Assembly

    Western Filter A Division of Donalson Company Inc replaces 663180-2

    PMA holder →
  • B101001-503#https://drs.faa.gov/browse/excelExternalWindow/9BDA695C023E28D9862584B7007279BF.0001##

    Coffee Maker

    Safran Cabin Inc. replaces B/E Aerospace, 50405-200

    PMA holder →
  • B101001-501#https://drs.faa.gov/browse/excelExternalWindow/388A1AF7446475438625849E005B85E1.0001##

    Coffee Maker

    Safran Cabin Inc. replaces B/E Aerospace, 50405-200

    PMA holder →
  • B101001-503#https://drs.faa.gov/browse/excelExternalWindow/B7AB13C96469262986257B6D00647A15.0001##

    Coffee Maker

    Safran Cabin Inc. replaces B/E Aerospace, 50405-200

    PMA holder →
  • KW 205S#https://drs.faa.gov/browse/excelExternalWindow/DB48D57F7AADA42F862584B70072702B.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S

    PMA holder →
  • KW 105S#https://drs.faa.gov/browse/excelExternalWindow/369DAC4F0D656F1E862584B700727035.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S

    PMA holder →
  • KW 105S-TB#https://drs.faa.gov/browse/excelExternalWindow/0D1D9E86B1069901862584B70072701A.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S-TB

    PMA holder →
  • KW 205S-DP-TB#https://drs.faa.gov/browse/excelExternalWindow/7582C2A54C29E7B7862584B70072703D.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-DP-TB

    PMA holder →
  • KW 205AL#https://drs.faa.gov/browse/excelExternalWindow/33E510295A199E2D862584B700726FCB.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205AL

    PMA holder →
  • KW 205S-PM-TB#https://drs.faa.gov/browse/excelExternalWindow/DA49F17E2B91F5AB862584B700726FF8.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-PM-TB

    PMA holder →
  • KW 205S-TB#https://drs.faa.gov/browse/excelExternalWindow/9B34D796E2D29FBD862584B700727009.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-TB

    PMA holder →
  • KW 105S-TB#https://drs.faa.gov/browse/excelExternalWindow/74BA7DF180F04D0086257F38006591EA.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S-TB

    PMA holder →
  • KW 205S-DP-TB#https://drs.faa.gov/browse/excelExternalWindow/1A80B8927180021A86257F3800659241.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-DP-TB

    PMA holder →
  • KW 105S#https://drs.faa.gov/browse/excelExternalWindow/F0919890DA82761386257F3800659225.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S

    PMA holder →
  • KW 205S#https://drs.faa.gov/browse/excelExternalWindow/02A8F1230DED5C3686257F3800659208.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S

    PMA holder →
  • KW 205S-PM-TB#https://drs.faa.gov/browse/excelExternalWindow/EC2E81DBA502FE5A86257F38006591A4.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-PM-TB

    PMA holder →
  • KW 205S-TB#https://drs.faa.gov/browse/excelExternalWindow/08A3F6060416BDEF86257F38006591CE.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-TB

    PMA holder →
  • KW 205AL#https://drs.faa.gov/browse/excelExternalWindow/3BDC0A3F2B6DC45E86257F380065917B.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205AL

    PMA holder →
  • KW 205S-DP-TB#https://drs.faa.gov/browse/excelExternalWindow/CEFDB36D63C1BEFF86257E46005FAECA.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-DP-TB

    PMA holder →
  • KW 105S#https://drs.faa.gov/browse/excelExternalWindow/E7CF86CB920CD10786257E46005FAE8F.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S

    PMA holder →
  • KW 105S-TB#https://drs.faa.gov/browse/excelExternalWindow/FEA99A865DE3AADE86257E46005FAE25.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S-TB

    PMA holder →
  • KW 205S#https://drs.faa.gov/browse/excelExternalWindow/B4FCE80302C4576686257E46005FAE58.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S

    PMA holder →
  • KW 205S-PM-TB#https://drs.faa.gov/browse/excelExternalWindow/07F2035C289C5F5D86257E46005FADB3.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-PM-TB

    PMA holder →
  • KW 205S-TB#https://drs.faa.gov/browse/excelExternalWindow/3FBD1065D40EF09A86257E46005FADF0.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-TB

    PMA holder →
  • KW 205AL#https://drs.faa.gov/browse/excelExternalWindow/638E4D918BEB11D686257E46005FAD49.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205AL

    PMA holder →
  • KW 205S-DP-TB#https://drs.faa.gov/browse/excelExternalWindow/3FF6A7E9A7D70B018625717600676344.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-DP-TB

    PMA holder →
  • KW 205S#https://drs.faa.gov/browse/excelExternalWindow/628E499B1FDE265286257176006762ED.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S

    PMA holder →
  • KW 105S#https://drs.faa.gov/browse/excelExternalWindow/BFC18616FAECCC2D8625717600676319.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S

    PMA holder →
  • KW 205S-TB#https://drs.faa.gov/browse/excelExternalWindow/33E2E3BF519E5B99862571760067627F.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-TB

    PMA holder →
  • KW 105S-TB#https://drs.faa.gov/browse/excelExternalWindow/5FF305F12CAD094C86257176006762B8.0001##

    Incandescent Displays

    WAMCO INC replaces KW 105S-TB

    PMA holder →
  • KW 205AL#https://drs.faa.gov/browse/excelExternalWindow/CCAD4C08DC1FC34D8625717600676215.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205AL

    PMA holder →
  • KW 205S-PM-TB#https://drs.faa.gov/browse/excelExternalWindow/0ACD96A834E86765862571760067624C.0001##

    Incandescent Displays

    WAMCO INC replaces KW 205S-PM-TB

    PMA holder →
  • A483-()AM () represents three digits that designate the color code.#https://drs.faa.gov/browse/excelExternalWindow/0CF1C37A0C0240BA8625836A004F8860.0001##

    Assembly Toilet Seat

    AeroMade Industries LLC replaces BWD7031-7273 BWD7031-6628 BWD7031-7453 BWD7031-6499 BWD7031-501

    PMA holder →
  • A483-()AM () represents three digits that designate the color code.#https://drs.faa.gov/browse/excelExternalWindow/A9C14828336F69AA862582F800488D36.0001##

    Assembly Toilet Seat

    AeroMade Industries LLC replaces BWD7031-7273, BWD7031-6628, BWD7031-7453, BWD7031-6499, BWD7031-501

    PMA holder →
  • A483-( )AM#https://drs.faa.gov/browse/excelExternalWindow/AC51FC0DBDAA17A6862585500067327C.0001##

    Assembly, Toilet Seat

    AeroMade Industries LLC replaces BWD7031-7273 BWD7031-6628 BWD7031-7453 BWD7031-6499 BWD7031-501

    PMA holder →
  • 8921069G5#https://drs.faa.gov/browse/excelExternalWindow/78E79978E005D0EC86258288005E25D7.0001##

    Heater Panel

    UTC Aerospace Systems, Goodrich Sensors & Integrated Systems replaces McDonnell Douglas PN SCD-7956497-507

    PMA holder →
  • 8921069G1#https://drs.faa.gov/browse/excelExternalWindow/FF37EF97108F6FE086258288005E25CD.0001##

    Heater Panel

    UTC Aerospace Systems, Goodrich Sensors & Integrated Systems replaces McDonnell Douglas PN SCD-7956497-1

    PMA holder →
  • 8921069G2#https://drs.faa.gov/browse/excelExternalWindow/1C2C03C2E399BB8686258288005E25D0.0001##

    Heater Panel

    UTC Aerospace Systems, Goodrich Sensors & Integrated Systems replaces McDonnell Douglas PN SCD-7956497-501

    PMA holder →

+ 20 more PMA parts on file

05 /  Aircraft of this type

All 1 registered N-numbers

Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged have NTSB events on file. Tails seeded with full TallyAero pages link directly.

1 of 1
N-number St Year NTSB FAA
N932CE AK 1970 · Look up ↗

Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)

05 /  Sources & Methodology

Every count traces back to a primary US-government source

We render counts and lists as the agency publishes them. Read the methodology →