Type Record · As of May 3, 2026
DOUGLAS AD-4
Fixed Wing Single Engine · AMA/EXPR UNKNOWN ENG
Registered
3
Year Range
1949–1949
NTSB Events
0
Airworthiness Directives
50
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered DOUGLAS AD-4 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- VA 33.3% 1
- TX 33.3% 1
- OR 33.3% 1
By Decade of Manufacture
- 1940s 33.3% 1
- Unknown 66.7% 2
02 / NTSB Records
Events involving DOUGLAS AD-4 aircraft
No NTSB-recorded events match DOUGLAS AD-4 in the indexed corpus.
03 / Airworthiness Directives
FAA directives applicable to DOUGLAS AD-4
50 directive(s) on file. Showing the most recent 25 · 25 more in the Federal Register.
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Feb 10, 2025
Airworthiness Directives; The Boeing Company Airplanes
The FAA is superseding Airworthiness Directive (AD) 2020-03- 20, which applied to certain The Boeing Company Model MD-11, MD-11F, and 717-200 airplanes; all Model 737-8 and 737-9 airplanes; all Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes; certain Model 747-400 and 747-400F series airplanes; cer…
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Feb 13, 2023
Airworthiness Directives; The Boeing Company Airplanes
The FAA is superseding Airworthiness Directive (AD) 2007-10- 04, which applied to all McDonnell Douglas Model DC-9-81 (MD-81), DC-9- 82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 airplanes. AD 2007-10-04 required repetitive inspections to detect cracks in the horizontal stabilizer, and related investigative…
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Sep 15, 2022
Airworthiness Directives; The Boeing Company Airplanes
The FAA proposes to supersede Airworthiness Directive (AD) 2007-10-04, which applies to all McDonnell Douglas Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 airplanes. AD 2007-10-04 requires repetitive inspections to detect cracks in the horizontal stabilizer, and related investig…
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May 12, 2022
Airworthiness Directives; The Boeing Company Airplanes
The FAA is superseding Airworthiness Directive (AD) 2017-14- 13, which applied to certain The Boeing Company Model 737-600, -700, - 700C, -800, -900, and -900ER series airplanes. AD 2017-14-13 required a torque check of the screws in the cover assembly of the heel rest for both the captain's and the first officer's ru…
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Jan 21, 2021
Airworthiness Directives; The Boeing Company Airplanes
The FAA proposes to supersede Airworthiness Directive (AD) 2017-14-13, which applies to certain The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. AD 2017-14-13 requires a torque check of the screws in the cover assembly of the heel rest for both the captain's and the first officer…
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Feb 6, 2020
Airworthiness Directives; The Boeing Company Airplanes
The FAA is superseding Airworthiness Directive (AD) 2017-15- 04, which applied to certain The Boeing Company Model 787-8 and 787-9 airplanes. AD 2017-15-04 required replacement of affected electromechanical actuators (EMAs). This AD retains the requirements of AD 2017-15-04; expands the applicability to include all Th…
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Jul 2, 2019
Airworthiness Directives; The Boeing Company Airplanes
The FAA proposes to supersede Airworthiness Directive (AD) 2017-15-04, which applies to certain The Boeing Company Model 787-8 and 787-9 airplanes. AD 2017-15-04 requires replacement of affected electromechanical actuators (EMAs). Since AD 2017-15-04 was issued, the FAA has determined that discrepant EMAs may have bee…
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Oct 24, 2018
Airworthiness Directives; The Boeing Company Airplanes
We are superseding Airworthiness Directive (AD) 2017-01-02, which applied to certain The Boeing Company Model 787-8 and 787-9 airplanes. AD 2017-01-02 required an inspection for discrepant inboard and outboard trailing edge flap rotary actuators, and replacing the rotary actuator or doing related investigative and cor…
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Feb 14, 2018
Airworthiness Directives; The Boeing Company Airplanes
We propose to supersede Airworthiness Directive (AD) 2017-01- 02, which applies to certain The Boeing Company Model 787-8 and 787-9 airplanes. AD 2017-01-02 requires an inspection for discrepant inboard and outboard trailing edge flap rotary actuators. Since we issued AD 2017-01-02, we have determined that it is neces…
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Apr 20, 2017
Airworthiness Directives; Siemens S.A.S. Smoke Detectors
We propose to adopt a new airworthiness directive (AD) for certain Siemens S.A.S. smoke detectors installed on various transport category airplanes. This proposed AD was prompted by a report that the affected smoke detectors failed an acceptance test. This proposed AD would require inspection and replacement of the af…
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May 10, 2016
Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model DC-10-10 and DC-10-10F airplanes, Model DC-10- 15 airplanes, Model DC-10-30 and DC-10-30F (KC-10A and KDC-10) airplanes, Model DC-10-40 and DC-10-40F airplanes, Model MD-10-10F and MD-10-30F airplanes, and Model MD-11 and MD-11F ai…
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Apr 27, 2016
Airworthiness Directives Legal Interpretation
The Federal Aviation Administration is issuing a legal interpretation on regulations applicable to airworthiness directives. This legal interpretation responds to questions asked by an Aviation Rulemaking Committee and is intended to resolve certain issues for the public.
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Mar 1, 2016
Airworthiness Directives; The Boeing Company Airplanes
We are superseding Airworthiness Directive (AD) 2008-26-07 for all The Boeing Company Model DC-8-11, DC-8-12, DC-8-21, DC-8-31, DC-8- 32, DC-8-33, DC-8-41, DC-8-42, and DC-8-43 airplanes; Model DC-8-50 series airplanes; Model DC-8F-54 and DC-8F-55 airplanes; Model DC-8-60 series airplanes; Model DC-8-60F series airpla…
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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…
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Jul 16, 2015
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-8 and 747-8F series airplanes. This AD was prompted by an analysis, which indicated that in a limited flight envelope with specific conditions, divergent flutter could occur during a high g-load maneuver in combination with cer…
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Jul 2, 2015
Airworthiness Directives; The Boeing Company Airplanes
We propose to supersede Airworthiness Directive (AD) 2008-26- 07, which applies to all McDonnell Douglas Model DC-8-11, DC-8-12, DC- 8-21, DC-8-31, DC-8-32, DC-8-33, DC-8-41, DC-8-42, and DC-8-43 airplanes; Model DC-8-50 series airplanes; Model DC-8F-54 and DC-8F-55 airplanes; Model DC-8-60 series airplanes; Model DC-…
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Mar 27, 2015
Airworthiness Directives; The Boeing Company Airplanes
We propose to supersede Airworthiness Directive (AD) 2013-08- 23, which applies to all The Boeing Company Model DC-10-10, DC-10-10F, DC-10-15, DC-10-30, DC-10-30F (KC-10A and KDC-10), DC-10-40, DC-10-40F, MD-10-10F, MD-10-30F, MD-11, and MD-11F airplanes. AD 2013-08-23 currently requires adding design features to dete…
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Dec 24, 2014
Airworthiness Directives; The Boeing Company Airplanes
We are superseding Airworthiness Directive (AD) 97-11-07 and AD 99-18-23, which apply to all The Boeing Company Model MD-90-30 airplanes. AD 97-11-07 and AD 99-18-23 required revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate certain compliance times for…
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Dec 17, 2014
Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-8 and 747-8F airplanes. This proposed AD was prompted by an analysis, which determined that in a limited flight envelope with specific conditions, divergent flutter could occur during a high g-load maneuver in combination w…
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Dec 9, 2013
Airworthiness Directives; The Boeing Company Airplanes
We propose to supersede Airworthiness Directives (ADs) 97-11- 07 and AD 99-18-23, which apply to all The Boeing Company Model MD-90- 30 airplanes. AD 97-11-07 and AD 99-18-23 currently require revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate certain co…
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Mar 14, 2013
Airworthiness Directives; The Boeing Company Airplanes
We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model MD-11 and MD-11F airplanes. The existing AD currently requires inspecting to determine if wires touch the upper surface of the center upper auxiliary fuel tank, and marking the location, as necessary; insp…
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Oct 1, 2012
Airworthiness Directives; The Boeing Company Airplanes
We are superseding an existing airworthiness directive (AD) for certain The Boeing Company Model DC-10-10, DC-10-10F, DC-10-15, DC- 10-30, DC-10-30F (KC-10A and KDC-10), DC-10-40, DC-10-40F, MD-10-10F, and MD-10-30F airplanes. That AD currently requires installing or replacing with improved parts, as applicable, the b…
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Mar 28, 2012
Airworthiness Directives; The Boeing Company Airplanes
We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model DC-10-10, DC-10- 10F, DC-10-15, DC-10-30, DC-10-30F (KC-10A and KDC-10), DC-10-40, DC- 10-40F, MD-10-10F, and MD-10-30F airplanes. The existing AD currently requires installing or replacing with improved p…
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Nov 29, 2011
Airworthiness Directives; McDonnell Douglas Corporation Airplanes
We are adopting a new airworthiness directive (AD) for certain Model DC-10-10, DC-10-10F, and MD-10-10F airplanes. This AD was prompted by reports of three instances of fuel leaks in the lower cap splice of the wing rear spar at station Xors=409. Investigation revealed the fuel leak was due to a crack in the lower cap…
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Feb 4, 2011
Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines
We are superseding an existing airworthiness directive (AD) for General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines with certain low-pressure turbine (LPT) rotor stage 3 disks installed. That AD currently requires initial and repetitive borescope inspections of the high-pressure turbine (HPT) rotor…
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for DOUGLAS AD-4
Advisory Circulars
ACs whose subject explicitly mentions DOUGLAS or AD-4.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 3 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.
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →