Airworthiness Directive Lookup Free FAA AD search by N-number, make or model
Find the FAA airworthiness directives that may apply to an aircraft: 12,857 ADs from the Federal Register since 1995, through Oct 1, 2026, each with its applicability text and the official document. Free, no account.
N257PL is a 1990 British Aerospace BAE 125 Series 800A in the FAA registry (aircraft page). Matched on type certificate model BAE 125 SERIES 800A.
RESULTS
3 ADs in effect may apply to N257PL
- In effect3
- Recurring0
- Superseded or removed0
Informational only. These are FAA airworthiness directives whose published applicability names this make and model. Whether an AD applies to a particular aircraft depends on its serial number, installed engines, propellers, parts and modifications, and some ADs listed here will not apply. This list is not the official AD record and not a compliance determination: confirm applicability and compliance against the FAA’s Dynamic Regulatory System and the aircraft’s records with a certificated mechanic or inspector. Covers ADs published in the Federal Register since 1995, through Oct 1, 2026; older ADs, and engine, propeller and appliance ADs that do not name the aircraft, are not included.
- AD 2006-16-18 One-time
Sandel Avionics Incorporated Model ST3400 Terrain Awareness Warning System/Radio Magnetic Indicator (TAWS/RMI) Units Approved Under Technical Standard Order(s) C113, C151a, or C151b; Installed on Various Small and Transport Category Airplanes
We are issuing this AD to prevent a bearing error, which could lead to an airplane departing from its scheduled flight path, which could result in a reduction in separation from, and a possible collision with, other aircraft or terrain.
Applicability, as the AD words it
This AD applies to Sandel Avionics Incorporated (Sandel) Model ST3400 terrain awareness warning system/radio magnetic indicator (TAWS/RMI) units approved under Technical Standard Order(s) C113, C151a, or C151b; as identified in Sandel ST3400 Service Bulletin SB3400-01, Revision B, dated September 15, 2004; as installed on various small and transport category airplanes, certificated in any category, including, but not limited, to the airplane models listed in Table 1 of this AD. Table 1.--Manufacturers/Airplane Models Manufacturer Airplane model(s) Airbus: A300. Avions Marcel Dassault-Breguet Aviation (AMD/BA).. Falcon 10. Boeing: 727, 737, 747. Bombardier (LearJet): 24, 35, 36, 55. British Aerospace (Operations) Limited: Jetstream Series 3101. Cessna: 208, 208B, 421C; 501, 525, 550, 560, 650, S550. Embraer: EMB-120. Dassault-Aviation: Mystere-Falcon 50, Mystere-Falcon 200. Gulfstream: G-I, G-1159A (G-III) Israel Aircraft Industries (IAI): 1124, 1125 Westwind Astra. McDonnell Douglas: DC-10. Piper: PA-31T2. Raytheon: 58; 1900D, 400; A36; BAe.125 Series 800A; HS.125 Series 600A/700A; Hawker 800-XP; 200, 300, 350; A200, B100, B200, B300, C90, C90A, C90B, E90, F90; MU-300-10. Sabreliner: 60 (NA-265-60). Twin Commander: 500-A, 695A. Viking Air Limited: DHC-6.
- AD 2006-12-20 One-time
Raytheon Model HS.125 Series 700A and 700B Airplanes; Model BAe.125 Series 800A (Including Variants C-29A and U-125), 800B, 1000A, and 1000B Airplanes; and Hawker 800 (Including Variant U-125A), 800XP, and 1000 Airplanes
We are issuing this AD to prevent loss of all primary electrical power, which could result in the airplane operating only under emergency power.
Applicability, as the AD words it
This AD applies to the Raytheon airplanes identified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD, certificated in any category. (1) Model HS.125 series 700A and 700B airplanes, on which Raytheon Modification 252885 has been incorporated or British Aerospace 125 Service Bulletin SB 24-239-2885 has been accomplished. (2) All Model BAe.125 series 800A (including variants C-29A and U-125), 800B, 1000A, and 1000B airplanes. (3) All Model Hawker 800 (including variant U-125A) and 1000 airplanes; and Model Hawker 800XP airplanes, serial numbers 1 through 258768 inclusive.
- AD 94-01-04 One-time
Honeywell Traffic Alert and Collision Avoidance System II Computer Units, as Installed on Various Transport Category Airplanes
To prevent collisions or near misses caused by incompatibility between the TCAS II processors and the current air traffic control system.
Applicability, as the AD words it
Traffic Alert and Collision Avoidance System (TCAS) II computer units; part numbers 4066010-901, -902, and -903; as installed on, but not limited to, the following airplanes, certificated in any category: Airbus Industrie Model A300-600, A310-200, A310-300, A320-200, and A340 series airplanes; Boeing Model 727-100 and -200; 737-100, -200, -300, and -400; 747- 100, -200, -300, -400 and 747SP; 757-200 and -500; and 767-200 and - 300 series airplanes; Cessna Citation Model C550 and C560 series airplanes, and Cessna Citation III and VII series airplanes; Canadair Challenger Model CL-600-2B16 and -2A12 series airplanes; British Aerospace Model 125-800A; Gulfstream Model GII, GIIB, GIII, and GIV series airplanes; Lockheed Model L-1011 series airplanes; McDonnell Douglas Model DC-9-10, -20, -30-, -40, and -50; DC-10-10, -15, -30, and -40; MD-11; and DC-9-80 series airplanes; and Model MD-88 airplanes; Dassault Aviation Model Mystere-Falcon 50 and 900 series airplanes; Short Brothers Model SD3-60 series airplanes; de Havilland Model DHC-8-100 and DHC-7 series airplanes; Fokker Model F27 series airplanes; and Corporate Jets Limited Model BAe 125-800A and BAe 125-1000A series airplanes.
Radar reads the logbooks and ties each AD to the entries that show how and when it was complied with, with recurring ADs due by date and hours.
QUESTIONS
AD lookup questions
Sources: FAA final rules under 14 CFR part 39, from the Federal Register; make and model from the FAA aircraft registry. The FAA’s Dynamic Regulatory System holds the official AD list.
What is an airworthiness directive (AD)?
An airworthiness directive is a legally enforceable rule the FAA issues under 14 CFR part 39 when it finds an unsafe condition in an aircraft, engine, propeller or appliance that is likely to exist in others of the same design. It says which products it applies to and what must be done, and by when: an inspection, a part replacement, a modification or a limitation. No one may operate a product to which an AD applies except in accordance with it.
How do I look up the ADs for my aircraft?
Type the N-number, or the make and model, into the box above. Radar finds the aircraft's make and model in the FAA registry and lists every AD published in the Federal Register whose applicability names it, newest first, with the AD's own applicability text and a link to the official document. The FAA's Dynamic Regulatory System (drs.faa.gov) holds the official list.
Does every AD in the results apply to my aircraft?
Not necessarily. An AD can be limited to serial number ranges, to aircraft with certain parts or modifications installed, or to a configuration. The results are ADs that may apply because they name the make and model. A certificated mechanic or inspector determines applicability against the aircraft's serial number and records, and records how each applicable AD was complied with.
What is the difference between a recurring and a one-time AD?
A one-time AD is complied with once, for example by replacing a part. A recurring (repetitive) AD requires an action again at an interval, such as an inspection every 100 hours or every 12 months, until a terminating action ends it. Radar marks an AD Recurring when its text requires repetitive actions; always read the AD for the intervals.
What does superseded mean?
When the FAA replaces an AD with a new one, the old AD is superseded: its requirements are carried into, or replaced by, the new AD. Results show the ADs in effect by default; superseded and removed ADs can be shown for the history.
Where does this data come from?
The Federal Register, where the FAA publishes every AD as a final rule. Radar reads each one from the Federal Register API (12,857 ADs since 1995) and refreshes the list every weekday. Make and model come from the FAA aircraft registry. ADs issued before 1995 are not in the Federal Register's online edition and are not included.
Are engine and propeller ADs included?
Only when their applicability names the aircraft. Most engine and propeller ADs name the engine or propeller model, so check those by the installed engine and propeller models. Appliance ADs that list the aircraft among those the appliance can be installed on are included and marked Appliance.
Know which ADs apply, and where each one was signed off.
Radar reads every logbook page, typed or handwritten, and builds one searchable record per tail: times, inspections, ADs and components, each tied to the page it came from.