Learjet Airworthiness Directives

Every AD in the library that names a Learjet aircraft model, gathered from its model pages.

49 not superseded, 7 of them with a repeat action. 54 listed in all, newest published February 2, 2023.

Published sinceHide 5 supersededOnly repeat actions49 of 54

2021-23-08Requires repetitively inspecting the center wing area for corrosion and deterioration of protective treatments, removing any corrosion, and treating any deteriorated areasWing, center box · AirplaneRepeat actionDec 6, 2021
2011-13-10Requires replacing the left engine fuel and hydraulic tubing and installing a tubing support channel, which terminates the repetitive inspections required in the existing ADPowerplant · AirplaneSupersedes 2009-11-13Repeat actionJun 27, 2011
2010-06-13Requires a general visual inspection for cracked and missing ballscrew assembly sleeves of the flap actuator, repetitive non-destructive liquid penetrant inspections of each sleeve or flap actuator for cracks, and...Flight controls · AirplaneRepeat actionMar 17, 2010
2005-16-09Requires an inspection of the flappers and flapper assemblies of the tip tank in each wing or a review of the airplane maintenance records to determine the part numbers, and replacement of certain flappers or flapper...Learjet Model 23, 24, 25, 35, and 36 Airplanes · AirplaneSupersedes 95-25-03Repeat actionAug 9, 2005
2004-03-08Requires modification of the drag angles of the fuselage and engine pylons to gain access to the shear webs of the forward engine beams; repetitive inspections of the shear webs of the forward engine beams for...Learjet Model 31, 31A, 35, 35A (C-21A), 36, and 36A Airplanes · AirplaneRepeat actionFeb 9, 2004
2003-17-08Learjet Model 45 AirplanesAirplaneSupersedes 2000-22-04Repeat actionAug 20, 2003
98-16-18Learjet Model 60 AirplanesAirplaneRepeat actionAug 7, 1998
2023-01-05Requires revising the existing inspection program to incorporate reduced inspection intervals for the anti-ice manifold assemblyPneumatic · AirplaneFeb 2, 2023
2022-05-01Requires removing certain spoiler assemblies from service and prohibits their installationSpoilers · AirplaneFeb 22, 2022
2021-23-11Requires replacing the existing fuel flow meter bracket assembly with a redesigned bracket assembly and reporting information to the FAAPowerplant system · AirplaneDec 6, 2021
2020-11-04Requires installing a thrust reverser (T/R) Voice Command Warning System (VCWS) to alert the crew of a T/R malfunctionEngine exhaust · AirplaneMay 21, 2020
2019-17-01FuselageAirplaneSupersedes 2017-11-09Aug 28, 2019
2017-04-15Requires a one-time inspection of the center ball of the aileron control cables for a defective swage, and corrective actions if necessaryFlight controls · AirplaneFeb 28, 2017
2015-12-06Requires a general visual inspection of the coupe rails to detect gouging and scratches, and to determine if a radius has been removed; an ultrasound inspection to measure the dimensions of the lower coupe rails; an...Fuselage · AirplaneJun 16, 2015
2014-13-06Requires inspecting for any corrosion, and damage to the sealant; installing sealants and gaskets; and related investigative and corrective actions as necessaryEngine exhaust · AirplaneJul 15, 2014
2013-24-04Requires retaining all actions in AD 2003-19-11, and it also requires determining if a certain fuel crossflow tube is installed, performing repetitive measurements of the fuel crossflow tube and surrounding valves...Fuel · AirplaneSupersedes 2003-19-11Feb 7, 2014
2013-14-07Requires modifying the fire seal on the baggage door, including doing inspections of the fire seal for correct contact and corrective action if necessaryEquipment/furnishings · AirplaneJul 22, 2013
2013-13-09Requires installing new rigid hydraulic tube assemblies to the MLG struts; installing a new MLG squat switch bracket, modifying the MLG squat switch wire harness; modifying the MLG anti-skid wheel transducer...Landing gear · AirplaneJul 2, 2013
2012-08-16Requires inspecting the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs; and...Extinguishing system · AirplaneApr 24, 2012
2011-25-03Requires revising the maintenance program to incorporate life limits for the MLG actuator end capLanding gear · AirplaneDec 19, 2011
2011-04-08Requires a general visual inspection for damage of wiring (including chafing, pinched wires, and exposed wires) and correct routing of wires in the left and right circuit breaker panels, and related investigative and...Electrical power · AirplaneFeb 24, 2011
2010-21-19Requires replacing aluminum fire extinguisher discharge tubes with new, improved tubes; checking the fire extinguisher container for certain serial numbers; replacing fire extinguisher containers that have affected...Fire protection · AirplaneOct 14, 2010
2010-11-11Landing gearAirplaneJun 8, 2010
2009-24-22Requires inspecting the baggage bay door fire barrier seal for inconel mesh in the fire barrier seal material; for certain airplanes, inspecting the fiberglass doublers for presence of red Room Temperature...Doors, and ata code 25: equipment/furnishings · AirplaneDec 4, 2009
2008-01-03Requires revising the Airworthiness Limitations section of the airplane maintenance manual to incorporate certain inspections and compliance times to detect fatigue cracking of certain principal structural elements...Learjet Model 45 Airplanes · AirplaneJan 10, 2008
2007-17-17Requires inspecting for unsealed gaps on the pylon side of the engine firewall and cleaning/ sealing any unsealed gap; and, for certain airplanes, inspecting for unsealed gaps of the pylon trailing edge and...Learjet Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes, and Model 45 Airplanes · AirplaneAug 28, 2007
2007-09-03Requires deactivating the auxiliary power unit (APU), capping/plugging the fuel lines to the APU, and removing the APU fuel shutoff valveLearjet Model 45 Airplanes · AirplaneApr 26, 2007
2007-04-18Requires modifying the left- and right-hand standby fuel pump switchesLearjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes · AirplaneFeb 16, 2007
2006-10-15Requires a review of airplane maintenance records to determine whether inspections identified by certain inspection reference numbers (IRNs) have been doneLearjet Model 45 Airplanes · AirplaneMay 16, 2006
2005-24-13Requires modifying the electrical wire bundle for the alternator on the left-hand engine, inspecting for clearance between wire harnesses and engine tubing for each engine, and corrective actions if necessaryLearjet Model 45 Airplanes · AirplaneDec 5, 2005
2005-23-06Requires removing the thrust reverser accumulator, and making the thrust reverser hydraulic system and the thrust reversers inoperableLearjet Model 23, 24, 24A, 24B, 24B-A, 24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, 25D, and 25F Airplanes Modified by Supplemental Type Certificate SA1731SW, SA1669SW, or SA1670SW · AirplaneNov 14, 2005
2005-23-03Requires replacement of the spherical accumulator for the main hydraulic system with a new cylindrical accumulatorLearjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, and 25F Airplanes · AirplaneNov 14, 2005
2005-13-36Requires a one-time inspection of the center ball of the aileron control cable or cables for a defective swage, and corrective actions if necessaryLearjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and 36 Airplanes · AirplaneJul 5, 2005
2003-16-19Learjet Model 45 AirplanesAirplaneAug 13, 2003
2003-16-09Requires replacement of those certain shear pins with new, improved shear pinsLearjet Model 45 Airplanes · AirplaneAug 12, 2003
2003-06-51Requires an inspection to determine the part number of the horizontal stabilizer actuator assembly (A66), and replacement of any suspect horizontal stabilizer actuator assembly (A66) with a new or serviceable...Learjet Model 45 Airplanes · AirplaneApr 21, 2003
2002-17-01Learjet Model 45 AirplanesAirplaneAug 28, 2002
2001-12-02Requires replacement of the brake valve adjustment screw with a new improved screw, and for certain airplanes, it would also require installation of a new brake valve lever stopLearjet Model 55 Series Airplanes and Model 60 Airplanes · AirplaneJun 13, 2001
2001-07-11Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series AirplanesAirplaneApr 16, 2001
2001-03-05Learjet Model 45 AirplanesAirplaneFeb 15, 2001
2000-24-19Requires revision of the Airplane Flight Manual (AFM) to add procedures for donning the flightcrew oxygen masks when the cabin altitude warning horn is activatedLearjet Model 35, 35A, 36, and 36A Series Airplanes · AirplaneNov 30, 2000
2000-23-18Requires inspecting the routing of oxygen tubing to ensure that there is adequate clamping of the tubing and adequate clearance between the tubing and electrical wiring or electrical contacts, and taking corrective...Learjet Model 60 Airplanes · AirplaneNov 21, 2000
2000-08-13Learjet Model 45 AirplanesAirplaneApr 28, 2000
95-19-04 R1Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C AirplanesAirplaneMar 27, 2000
99-23-19Requires a visual inspection of the spoiler actuators to determine the serial number of the spoiler actuators; and replacement of the spoiler actuators with new actuators, if necessaryLearjet Model 31, 31A, 35, 35A, and 60 Airplanes · AirplaneNov 16, 1999
99-16-03Requires a one-time detailed visual inspection of the electrical wire leads of the horizontal stabilizer anti-ice system to verify that the numbers on the wire leads correctly correspond to the numbers on the...Learjet Model 23, 24, 25, 28, 29, 31, 55, and 60 Series Airplanes · AirplaneAug 2, 1999
98-06-28Learjet Model 31 and 35A AirplanesAirplaneSupersedes 96-11-07Mar 20, 1998
95-21-03Learjet Model 31A and 60 AirplanesAirplaneOct 11, 1995
95-19-04Requires installation of a placard on the instrument panel in the cockpit to advise the flightcrew that the Omega navigation system may be inoperative at certain engine speedsLearjet Model 35, 35A, 36, 36A, 55, 55B, and 55C Airplanes · AirplaneSep 12, 1995

Listed by the model designations in each AD's text. An AD written for a part number, or for "all" engines of a maker, may name no model and so not appear here: search the library for the part or the maker as well.