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.
N730K is a 2019 Learjet 75 in the FAA registry (aircraft page). Matched on type certificate model 45.
RESULTS
28 ADs in effect may apply to N730K
- In effect28
- Recurring4
- Superseded or removed5
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.
Also show 5 superseded or removed N730K’s registration record
- AD 2023-01-05 One-time
Learjet, Inc., Airplanes
This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary.
Applicability, as the AD words it
This AD applies to Learjet, Inc., Model 45 (Learjet 40), Model 45 (Learjet 45), Model 45 (Learjet 70), and Model 45 (Learjet 75) airplanes, certificated in any category, with an original airworthiness certificate or original export certificate of airworthiness issued on or before January 18, 2022.
- AD 2021-23-11 One-time
Learjet Inc. Airplanes
This AD was prompted by a report of a fuel leak due to a cracked fuel line between the engine fuel control and the engine fuel flow meter.
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 (Learjet 40), Model 45 (Learjet 45), Model 45 (Learjet 70), and Model 45 (Learjet 75) airplanes, serial numbers 45-002 through 45-556 and 45-2001 through 45-2146, certificated in any category.
- AD 2021-23-08 Recurring
Learjet Inc. Airplanes
This AD was prompted by reports of corrosion found on the upper surface of the lower center wing mid spar splice plate.
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 (Learjet 40), Model 45 (Learjet 45), Model 45 (Learjet 70), and Model 45 (Learjet 75) airplanes, serial numbers 45-002 through 45-596 and 45-2001 through 45-2146, certificated in any category.
- AD 2015-12-06 One-time
Learjet Inc. Airplanes
This AD was prompted by reports of non-conforming windshield supports (coupe rails).
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category, as identified in Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012 (for airplanes having serial numbers (S/Ns) 45-2000 through 45-2120 inclusive, and S/Ns 45-2122 through 45-2130 inclusive); and Bombardier Recommended Service Bulletin 45-56-3, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-005 through 45-427 inclusive).
- AD 2014-13-06 One-time
Learjet Inc. Airplanes
This AD was prompted by a report of two cases of premature corrosion found on the structural support flange for the engine thrust reverser.
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes having serial numbers (S/Ns) 45-005 through 45-436 inclusive, and 45-2001 through 45-2132 inclusive, certificated in any category, that are equipped with composite engine fan bypass ducts.
- AD 2013-14-07 One-time
Learjet Inc. Airplanes
This AD was prompted by a report that the fire barrier seal on the external baggage door does not seal the surrounding door structure due to incorrect positioning of the barrier.
Applicability, as the AD words it
This AD applies to Learjet Model 45 airplanes, certificated in any category; serial numbers 45-002 through 45-380 inclusive, 45-382 through 45-396 inclusive, 45-398 through 45-405 inclusive, 45-2001 through 45-2114 inclusive, 45-2116, 45-2118, 45-2120, 45-2122, and 45-2124 through 45-2126 inclusive.
- AD 2012-08-08 One-time Appliance
Learjet Inc.
This AD was prompted by changes to the Airworthiness Limitations Section (ALS) of the maintenance manual (MM), which adds life- limits, revises life-limits, or adds inspections not previously identified.
Applicability, as the AD words it
(1) This AD applies to all Learjet Inc., Model 45 airplanes, certificated in any category. (2) This AD requires revisions to certain operator maintenance documents to include new actions (e.g. inspections). Compliance with these actions is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these actions, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (i) of this AD. The request should include a description of changes to the required actions that will ensure the continued operational safety of the airplane. The FAA has provided guidance for this determination in FAA Advisory Circular (AC) 25.1529-1A, dated November 20, 2007. http://rgl.faa.gov/Regulatory-- and--Guidance--Library/rgAdvisoryCircular.nsf/list/AC%2025.1529-1A/ $FILE/AC%2025.1529-1A.pdf.
- AD 2011-25-03 One-time
Learjet Inc. Airplanes
This AD was prompted by a report of the potential for fatigue cracking of the end cap of the main landing gear (MLG) prior to the published life limitation.
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category; all serial numbers.
- AD 2011-13-10 Recurring
Learjet Inc. Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes; certificated in any category; serial numbers 45-005 through 45-405 inclusive, and 45-2001 through 45-2126 inclusive.
- AD 2011-04-08 One-time
Learjet Inc. Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category; having serial numbers identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Serial numbers 45-2001 through 45-2114 inclusive, 45-2116 through 45-2120 inclusive, 45-2122, 45-2125, and 45-2126. (2) Serial numbers 45-005 through 45-380 inclusive, 45-382 through 45-391 inclusive, 45-393 through 45-396 inclusive, 45-398, 45-400, 45-401, and 45-403.
- AD 2010-21-19 One-time
Learjet Inc. Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category; as identified in Bombardier Service Bulletins 40-26-05 and 45-26-9, both Revision 2, both dated May 4, 2009.
- AD 2010-07-02 One-time
Various Aircraft Equipped With Honeywell Primus II RNZ-850( )/-851( ) Integrated Navigation Units
Applicability, as the AD words it
This AD applies to various aircraft, certificated in any category, equipped with any Honeywell Primus II RNZ-850( )/-851( ) integrated navigation units (INUs) identified in a service bulletin identified in Table 1 of this AD. The aircraft include, but are not limited to, BAE Systems (Operations) Limited (Jetstream) Model 4101 airplanes; Bombardier Model BD-700-1A10 airplanes; Bombardier Model CL-215-6B11 (CL-415 variant) airplanes; Cessna Model 560, 560XL, and 650 airplanes; Dassault-Aviation Model Mystere-Falcon 50 airplanes; 328 Support Services GmbH (Dornier) Model 328-100 and -300 airplanes; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes; Learjet Model 45 airplanes; Hawker Beechcraft Corporation Model Hawker 800XP and Hawker 1000 airplanes; and Sikorsky Model S-76A, S-76B, and S-76C aircraft. Table 1--Service Bulletins Affected by This AD INUs listed in Honeywell-- Revision-- Dated-- (1) Alert Service Bulletin 001: March 4, 2003. 7510134-34-A0016. (2) Alert Service Bulletin Original: July 11, 2003. 7510134-34-A0017. (3) Service Bulletin 7510134- Original: July 8, 2004. 34-0018. (4) Alert Service Bulletin Original: February 28, 2003. 7510100-34-A0034. (5) Alert Service Bulletin Original: July 11, 2003. 7510100-34-A0035. (6) Service Bulletin 7510100- Original: July 8, 2004. 34-0037.
- AD 2010-06-13 Recurring
Learjet Inc. Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category, serial numbers 45-005 through 45-380 inclusive and 45-2001 through 45-2111 inclusive.
- AD 2009-24-22 One-time
Learjet Inc. Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category, serial numbers 45-005 through 45-321 inclusive, 45-323 through 45-332 inclusive, and 45-2001 through 45- 2075 inclusive.
- AD 2008-02-19 One-time Engine
Honeywell International Inc. TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, and -60 Series Turbofan Engines
We are issuing this AD to prevent uncontained failure of the HP turbine rotor assembly, which could result in damage to the airplane.
Applicability, as the AD words it
This AD applies to Honeywell International Inc. (Honeywell) TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, - 20R, -20AR, -20BR, -40, -40AR, -40R, and -60 series turbofan engines with certain high pressure (HP) turbine rotor discs part numbers and serial numbers. These engines are installed on, but not limited to, the following airplanes: Avions Marcel Dassault Mystere-Falcon 10 and 50 Series Cessna Model 650; Citations III, VI, and VII Dassault-Aviation 20, 50, 50EX, 900, MF900, and 900EX (900DX) Series Gulfstream Aerospace LP (formerly IAI) 1125 Westwind Astra, Astra SPX, Gulfstream 100 Series Israel Aircraft Industries (IAI) 1124 Series (Westwind 1124) Learjet 31, 35, 36, 45 (or Learjet 40), and 55 Series Lockheed-Georgia 3329-25 Series (731 Jetstar, Jetstar II) Raytheon Corporate Jets (formerly British Aerospace) Hawker 800 and 850 Series Sabreliner NA-265-65 (Sabreliner 65)
- AD 2008-01-03 One-time
Learjet Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Model 45 airplanes, certificated in any category; serial numbers (S/Ns) 45-002 through 45-302 inclusive, and S/Ns 45-2001 through 45-2049 inclusive.
- AD 2007-17-17 One-time
Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes, and Model 45 Airplanes
We are issuing this AD to prevent penetration of flammable liquids or fire through the engine firewall into the engine pylon, which could lead to fire inside the airplane.
Applicability, as the AD words it
This AD applies to Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C airplanes, and Model 45 airplanes; certificated in any category; as identified in the service information specified in Table 1 of this AD. Table 1.--Applicable Service Information Learjet airplane model Service Bulletin Revision level Date 31/31A: Bombardier Service 1: August 21, 2006. Bulletin 31-54-2. 45: Bombardier Service 2: August 15, 2003. Bulletin 45-54-3. 35/35A (C-21A) and 36/36A: Learjet Service Original: March 16, 2001. Bulletin 35/36-54-3. 55/55B/55C: Learjet Service Original: March 16, 2001. Bulletin 55-54-3.
- AD 2007-09-03 One-time
Learjet Model 45 Airplanes
We are issuing this AD to prevent fuel leaking from the fuel shutoff valve of the APU, which could result in an uncontrollable fire and adversely affect the airplane's continued safe flight and landing.
Applicability, as the AD words it
This AD applies to Learjet Model 45 airplanes, certificated in any category; serial numbers 45-005 through 45-321, equipped with an auxiliary power unit (APU).
- AD 2006-19-04 One-time
Honeywell RCZ-833J/K, -851J/K, and -854J Communication (COM) Units, Equipped with XS-852E/F Mode S Transponders; and Honeywell XS-856A/B and -857A Mode S Transponders; Installed on But Not Limited to Certain Transport Category Airplanes
We are issuing this AD to prevent the transponder of the COM unit from going into standby mode, which could increase the workload on the flightcrew and result in improper functioning of the traffic alert and collision avoidance system.
Applicability, as the AD words it
This AD applies to the Honeywell parts identified in paragraphs (c)(1) and (c)(2) of this AD, approved under Technical Standard Order TSO-C112, installed on but not limited to Bombardier Model BD-700-1A10 and BD-700-1A11 airplanes; Cessna Model 550 and 560 airplanes; Cessna Model 650 airplanes; Dassault Model Falcon 900EX airplanes, serial number (S/N) 97 and S/Ns 120 and subsequent; Dassault Model Falcon 2000EX airplanes, S/N 6 and S/Ns 28 and subsequent; EMBRAER Model EMB-135BJ, -135ER, -135KE, -135KL, and - 135LR airplanes; EMBRAER Model EMB-145, -145ER, -145MR, -145LR, - 145XR, -145MP, and -145EP airplanes; Learjet Model 45 airplanes; Lockheed Model 282-44A-05 (C-130B) airplanes; Lockheed Model 382G series airplanes; Raytheon Model Hawker 800 (including variant U- 125A), 800XP, and 1000 airplanes; certificated in any category. (1) Communication (COM) unit RCZ-833J part numbers (P/Ns) 7510700-763 and -863; RCZ-833K P/Ns 7510700-765 and -875; RCZ-851J P/N 7510700-813; RCZ-851K P/N 7510700-815; and RCZ-854J P/Ns 7510700-725 and -825. (2) Mode S transponder XS-856A P/Ns 7517400-865 and -885; XS- 856B P/Ns 7517400-866 and -886; and XS-857A P/Ns 7517400-876 and - 896.
- AD 2006-10-15 One-time
Learjet Model 45 Airplanes
Applicability, as the AD words it
This AD applies to Learjet Model 45 airplanes, serial numbers 45-005 through 45-295 inclusive, and 45-2001 through 45-2044 inclusive; certificated in any category.
- AD 2005-24-13 One-time
Learjet Model 45 Airplanes
We are issuing this AD to prevent chafing between the wire bundle for the alternator on each engine and the hydraulic lines, which could result in a fire in the engine nacelle.
Applicability, as the AD words it
This AD applies to Learjet Model 45 airplanes, certificated in any category; serial numbers (S/Ns) 45-005 through 45-273 inclusive, and 45-2001 through 45-2029 inclusive.
- AD 2003-17-08 Recurring
Learjet Model 45 Airplanes
To prevent moisture contamination and subsequent formation of ice which could cause bending and damage of the squat switch assembly of the nose landing gear (NLG), driving the nose wheel to an uncommanded angle against the force of the steering system, and consequently resulting in the airplane departing the runway at high speeds during landing.
Applicability, as the AD words it
Model 45 airplanes, certificated in any category; serial numbers (S/N) 45-005 through 45-071 inclusive, that have been modified per Bombardier Service Bulletin 45-32-3; and S/Ns 45-072 through 45-114 inclusive.
- AD 2003-16-19 One-time
Learjet Model 45 Airplanes
To prevent structural failure of the horizontal stabilizer actuator assembly (HSAA), which could result in possible loss of control of the airplane.
Applicability, as the AD words it
All Model 45 airplanes, certificated in any category.
- AD 2003-16-09 One-time
Learjet Model 45 Airplanes
Applicability, as the AD words it
Model 45 airplanes, serial numbers 45-005 through 45-208 inclusive, 45-210 through 45-222 inclusive, 45-224, 45-225, 45-227, and 45-229 through 45-231 inclusive; certificated in any category.
- AD 2003-06-51 One-time
Learjet Model 45 Airplanes
To prevent structural failure of the horizontal stabilizer actuator assembly, which could result in possible loss of control of the airplane.
Applicability, as the AD words it
Model 45 airplanes, serial numbers 45-001 through 45-232 inclusive; certificated in any category.
- AD 2002-17-01 One-time
Learjet Model 45 Airplanes
To prevent an electrical short circuit between the pilot's and copilot's foot warmers and the composite floor boards, which could result in outgassing of the faceply material of the composite floorboards, and consequent smoke in the cockpit.
Applicability, as the AD words it
Model 45 airplanes, serial numbers 45-005 through 45-213 inclusive; certificated in any category.
- AD 2001-03-05 One-time
Learjet Model 45 Airplanes
To prevent metal fragments from breaking off the anti-ice manifold assembly due to fatigue, which could block a duct in the anti-ice system and result in an unannunciated loss of ice protection.
Applicability, as the AD words it
Model 45 airplanes, certificated in any category, serial numbers 45-002 through 45-004 inclusive, 45-006 through 45- 121 inclusive, and 45-124 through 45-129 inclusive.
- AD 2000-08-13 One-time
Learjet Model 45 Airplanes
to detect an uncommanded brake application condition during taxi and takeoff, which could result in a possible wheel/brake fire and/or a high- speed rejected takeoff.
Applicability, as the AD words it
Model 45 airplanes on which Crane Hydro-Aire brake control unit part number (P/N) 42-933-2 is installed; certificated in any category.
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.