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2023-01-05

final rule

Airworthiness Directives; Learjet, Inc., Airplanes

Unsafe Condition: metal fragments 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 and subsequent loss...

Effective: Mar 9, 2023 Category: aircraft Compliance: Within 60 days after the effective date of this AD

Why matched: Airworthiness Directives; Learjet, Inc., Airplanes

2022-05-01

final rule

Airworthiness Directives; Learjet, Inc., Airplanes

Unsafe Condition: Operation of an airplane with a spoiler assembly beyond its FAA-approved life limit, if not addressed, could lead to undetected cracking and consequent failure or separation of the spoiler assembly...

Effective: Mar 9, 2022 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet, Inc., Airplanes

2021-23-08 Recurring

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Corrosion found on the upper surface of the lower center wing mid spar splice plate, which could result in failure of the wing centerline joint and lead to partial wing separation with consequent l...

Effective: Jan 10, 2022 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2021-23-11

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: A cracked fuel line between the engine fuel control and the engine fuel flow meter, and other failures in this area, may have resulted from vibration.

Effective: Jan 10, 2022 Category: engine Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2020-11-04

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: The acceleration with reverse thrust commanded occurred when the thrust reverser doors were in the stowed position instead of the deployed position.

Effective: Jun 25, 2020 Category: aircraft Compliance: Within 1,200 hours time-in-service or 48 months after the effective date of this AD.

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2019-17-01

final rule

Airworthiness Directives; Learjet, Inc. Airplanes

Unsafe Condition: The upper fuselage skin under the aft oxygen line fairing is subject to multi-site damage, which could result in reduced structural integrity of the airplane.

Effective: Oct 2, 2019 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet, Inc. Airplanes

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure

2018-19-04 Recurring

final rule

Airworthiness Directives; Learjet, Inc. Airplanes

Unsafe Condition: fatigue cracks initiating in the flap support structure due to repetitive flap loads, which has caused flap nose roller support bracket failure

Effective: Oct 23, 2018 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet, Inc. Airplanes

2017-11-09

final rule

Airworthiness Directives; Learjet, Inc., Airplanes

Unsafe Condition: Corrosion of the fuselage skin, which could result in reduced structural integrity of the airplane.

Effective: May 30, 2017 Category: aircraft Compliance: Within 50 flight hours after the effective date of this AD.

Why matched: Airworthiness Directives; Learjet, Inc., Airplanes

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure

2017-08-07

final rule

Airworthiness Directives; Learjet, Inc., Airplanes

Unsafe Condition: The upper fuselage skin under the aft oxygen line fairing is subject to multi-site damage (MSD) due to corrosion.

Effective: May 22, 2017 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet, Inc., Airplanes

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure

2017-04-15

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: An aileron cable failed on an airplane during a tension check, indicating severe weakening of the aileron cable and consequent reduced controllability of the airplane.

Effective: Apr 4, 2017 Category: aircraft Compliance: Within 100 flight hours or 90 days after the effective date, whichever occurs first.

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls

2015-12-06

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Non-conforming windshield supports (coupe rails) could result in uncontrolled cabin depressurization and compromise the capability of the windshield to withstand a bird strike.

Effective: Jul 21, 2015 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2012-26-15 R1

final rule

Airworthiness Directives; Honeywell International Inc. Air Data Pressure Transducers

Unsafe Condition: Inaccuracies of the pressure sensors could result in altitude, computed airspeed, true airspeed, and Mach computation errors, which could reduce the ability of the flightcrew to maintain the safe f...

Effective: Dec 3, 2014 Category: appliance Compliance: before further flight

Why matched: Airworthiness Directives; Honeywell International Inc. Air Data Pressure Transducers

2014-13-06

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Premature corrosion found on the structural support flange for the engine thrust reverser, which could lead to failure of the thrust reverser structural support and subsequent departure of the thru...

Effective: Aug 19, 2014 Category: engine Compliance: Within the compliance times specified in the AD, unless already done.

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2013-24-04 Recurring

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Chafing and consequent failure of the fuel crossflow tube due to inadequate clearance between the tube and the flight control cables, which could result in loss of fuel from one fuel tank during no...

Effective: Mar 14, 2014 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2013-14-07

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: The fire barrier seal on the external baggage door does not seal the surrounding door structure due to incorrect positioning of the barrier.

Effective: Aug 26, 2013 Category: aircraft Compliance: Within 300 flight hours after the effective date of this AD.

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

2013-13-09

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Failure of the braking system or adverse operation of the spoiler and thrust reverser system due to external damage, particularly from tire failure.

Effective: Aug 6, 2013 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2012-08-16

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Swapped fire extinguishing wires could cause the extinguishing agent of the fire extinguishing container to be delivered to the wrong engine in the event of an engine fire, and a consequent uncontr...

Effective: May 29, 2012 Category: engine Compliance: Within 300 flight hours after the effective date of this AD, or at the next auxiliary power unit ...

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

Technical illustration of an aircraft turbine engine assembly
Problem area Engine

2012-08-08

final rule

Airworthiness Directives; Learjet Inc.

Unsafe Condition: Changes to the Airworthiness Limitations Section (ALS) of the maintenance manual, which adds life-limits, revises life-limits, or adds inspections not previously identified, could result in corrosi...

Effective: May 29, 2012 Category: aircraft Compliance: Within 90 days after the effective date of this AD.

Why matched: Airworthiness Directives; Learjet Inc.

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls

2011-25-03

final rule

Airworthiness Directives; Learjet Inc. Airplanes

Unsafe Condition: Fatigue cracking of the end cap of the main landing gear (MLG) prior to the published life limitation, which could result in the failure of the MLG actuator upon landing, and failure of the MLG to ...

Effective: Jan 23, 2012 Category: aircraft Compliance: Within 30 days after the effective date of the AD for maintenance program revision. Replacement o...

Why matched: Airworthiness Directives; Learjet Inc. Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2011-13-10 Recurring

final rule

Airworthiness Directives; Learjet Inc. Model 45 Airplanes

Unsafe Condition: Chafed hydraulic tubes in the left-hand engine, leading to hydraulic tube failure and uncontrolled loss of flammable fluid within the engine cowling, which could result in a fire in the engine nace...

Effective: Aug 1, 2011 Category: engine Compliance: Within 50 flight hours after August 1, 2011.

Why matched: Airworthiness Directives; Learjet Inc. Model 45 Airplanes

2011-04-08

final rule

Airworthiness Directives; Learjet Inc. Model 45 Airplanes

Unsafe Condition: Reports of wire damage on the pilot and copilot circuit breaker panels caused by a short circuit between chafed wiring and the circuit breaker panel forward mounting bracket.

Effective: Mar 31, 2011 Category: engine Compliance: Within 50 flight hours after the effective date

Why matched: Airworthiness Directives; Learjet Inc. Model 45 Airplanes

Technical illustration of an aircraft electrical generator and wiring assembly
Problem area Electrical system

2010-21-19

final rule

Airworthiness Directives; Learjet Inc. Model 45 Airplanes

Unsafe Condition: Accidental discharge of a fire extinguisher container and damage to an aluminum discharge tube, leading to inaccurate pressure indication and potential failure of the fire extinguisher system, whic...

Effective: Nov 18, 2010 Category: aircraft Compliance: Within 12 months after the effective date of this AD.

Why matched: Airworthiness Directives; Learjet Inc. Model 45 Airplanes

2010-11-11

final rule

Airworthiness Directives; Learjet Inc. Model 60 Airplanes

Unsafe Condition: Main landing gear tires blowing out during a takeoff roll, which could result in failures of the braking and thrust reverser systems, potentially leading to loss of airplane control during a critic...

Effective: Jul 13, 2010 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Learjet Inc. Model 60 Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2010-07-02

final rule

Airworthiness Directives; Various Aircraft Equipped With Honeywell Primus II RNZ-850( )/-851( ) Integrated Navigation Units

Unsafe Condition: Erroneous localizer and glideslope indications have occurred on certain aircraft equipped with Honeywell Primus II RNZ-850( )/-851( ) integrated navigation units (INUs).

Effective: May 3, 2010 Category: aircraft Compliance: Within the specified compliance time, unless already accomplished.

Why matched: Airworthiness Directives; Various Aircraft Equipped With Honeywell Primus II RNZ-850( )/-851( ) Integrated Navigation Units

2010-06-13 Recurring

final rule

Airworthiness Directives; Learjet Inc. Model 45 Airplanes

Unsafe Condition: Cracked and missing ballscrew assembly sleeves of the flap actuators, which could cause loss of the load-carrying ball bearings on both actuators on one flap, resulting in flap asymmetry and loss o...

Effective: Apr 1, 2010 Category: aircraft Compliance: Within 15 days after the effective date of this AD.

Why matched: Airworthiness Directives; Learjet Inc. Model 45 Airplanes