2026-17-10
final ruleAirworthiness Directives; Lycoming Engines
Unsafe Condition: Piston pin failure resulting in metal particulate contamination in the engine oil and engine failure.
Why matched: Airworthiness Directives; Lycoming Engines
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199 results found (2000ms)
2026-04-11 Recurring
final ruleAirworthiness Directives; Lycoming Engines
Unsafe Condition: Reports of connecting rod failures, which resulted in uncontained engine failure and in-flight shutdowns.
Why matched: Airworthiness Directives; Lycoming Engines
2024-21-02 Recurring
final ruleAirworthiness Directives; Lycoming Engines
Unsafe Condition: Connecting rod failures, which resulted in uncontained engine failure and in-flight shutdowns (IFSDs), due to degradation of the connecting rod small end bushings.
Why matched: Airworthiness Directives; Lycoming Engines
2023-09-09 Recurring
final ruleAirworthiness Directives; Various Airplanes, Helicopters, and Engines
Unsafe Condition: Multiple failures of spot-welded, multi-segment v-band couplings at the tailpipe to the turbocharger exhaust housing flange.
Why matched: Airworthiness Directives; Various Airplanes, Helicopters, and Engines
2022-16-03
final ruleAirworthiness Directives; Continental Aerospace Technologies, Inc., Lycoming Engines, and Textron Lycoming/Subsidiary of Textron, Inc. Reciprocating Engines
Unsafe Condition: A manufacturing quality escape of improperly lubricated roller bearings installed in certain magnetos, which may result in overheating and magneto seizure.
Why matched: Airworthiness Directives; Continental Aerospace Technologies, Inc., Lycoming Engines, and Textron Lycoming/Subsidiary of Textron, Inc. Reciprocating Engines
2022-10-02 Recurring
final ruleAirworthiness Directives; Honeywell International, Inc. (Type Certificate Previously Held by AlliedSignal, Inc. and Textron Lycoming) Turboshaft Engines
Unsafe Condition: tachometer drive spur gear failure, resulting in potential engine overspeed, loss of power turbine speed (N2) instrument panel indication, and hard landings.
Why matched: Airworthiness Directives; Honeywell International, Inc. (Type Certificate Previously Held by AlliedSignal, Inc. and Textron Lycoming) Turboshaft Engines
2020-25-12
final ruleAirworthiness Directives; Superior Air Parts, Inc. Engines and Lycoming Engines Reciprocating Engines With a Certain SAP Crankshaft Assembly
Unsafe Condition: The presence of a white layer on the crankshaft assembly, which is brittle and can lead to spalling or fatigue cracking of the crankshaft assembly as a result of the normal mechanical loads during ...
Why matched: Airworthiness Directives; Superior Air Parts, Inc. Engines and Lycoming Engines Reciprocating Engines With a Certain SAP Crankshaft Assembly
2017-16-11
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines
Unsafe Condition: Connecting rod failures resulting in uncontained engine failure and in-flight shutdowns (IFSDs).
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines
2017-11-10 Recurring
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines
Unsafe Condition: Cracked engine exhaust pipes and exhaust studs pulling out from cylinders on Lycoming TIO-540-AJ1A reciprocating engines, which could lead to engine exhaust leaks.
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines
2015-19-07
final ruleAirworthiness Directives; Lycoming Engines Fuel Injected Reciprocating Engines
Unsafe Condition: Failure of the fuel injector fuel lines, which could lead to uncontrolled engine fire, engine damage, and damage to the airplane.
Why matched: Airworthiness Directives; Lycoming Engines Fuel Injected Reciprocating Engines
2015-10-06
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate Previously Held by Textron Lycoming Division, AVCO Corporation)
Unsafe Condition: cracked engine exhaust pipes
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate Previously Held by Textron Lycoming Division, AVCO Corporation)
2015-02-07
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate previously held by Textron Lycoming Division, AVCO Corporation)
Unsafe Condition: Propeller governor shaft set screws coming loose due to improper installation.
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines (Type Certificate previously held by Textron Lycoming Division, AVCO Corporation)
Amdt-39-17881
final ruleAirworthiness Directives; AERMACCHI S.p.A. Airplanes
Unsafe Condition: Improper position of the set screw, which could lead to complete loss of engine oil pressure and result in emergency landing.
Why matched: Airworthiness Directives; AERMACCHI S.p.A. Airplanes
2013-21-02
final ruleAirworthiness Directives; Lycoming Engines and Continental Motors, Inc. Reciprocating Engines
Unsafe Condition: Turbocharger turbine wheel failure, reduction or complete loss of engine power, loss of engine oil, oil fire, and damage to the airplane.
Why matched: Airworthiness Directives; Lycoming Engines and Continental Motors, Inc. Reciprocating Engines
2012-24-09
final ruleAirworthiness Directives; Lycoming Engines and Continental Motors, Inc. Reciprocating Engines
Unsafe Condition: Failure of the turbocharger could result in engine failure and subsequent loss of control of the aircraft.
Why matched: Airworthiness Directives; Lycoming Engines and Continental Motors, Inc. Reciprocating Engines
2012-19-01
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines
Unsafe Condition: Failure of the crankshaft, which will result in total engine power loss, in-flight engine failure, and possible loss of the aircraft.
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines
2012-03-07
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines
Unsafe Condition: A 'machined-from-billet' HA-6 carburetor having a loose mixture control sleeve that rotated in the carburetor body causing restriction of fuel and power loss.
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines
Amdt-39-16909
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines
Unsafe Condition: Failed fuel injector tube assembly.
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines
71-13-01R1
final ruleAirworthiness Directives; Lycoming Engines Reciprocating Engines
Unsafe Condition: Rescinding an airworthiness directive
Why matched: Airworthiness Directives; Lycoming Engines Reciprocating Engines
2012-03-06
final ruleAirworthiness Directives; Superior Air Parts, Lycoming Engines (Formerly Textron Lycoming), and Continental Motors, Inc., Fuel-Injected Reciprocating Engines
Unsafe Condition: Failed AFS fuel servo diaphragms, part numbers AV2541801 or AV2541803, could lead to an in-flight engine shutdown and damage to the airplane.
Why matched: Airworthiness Directives; Superior Air Parts, Lycoming Engines (Formerly Textron Lycoming), and Continental Motors, Inc., Fuel- Injected Reciprocating Engines
2011-26-04
final ruleAirworthiness Directives; Lycoming Engines, Fuel Injected Reciprocating Engines
Unsafe Condition: Failure of the fuel injector fuel lines that would allow fuel to spray into the engine compartment, resulting in an engine fire.
Why matched: Airworthiness Directives; Lycoming Engines, Fuel Injected Reciprocating Engines
2011-18-09
final ruleAirworthiness Directives; Lycoming Engines Model IO-720-A1B Reciprocating Engines
Unsafe Condition: Failure of a crankshaft due to incorrect parts installed, specifically improper counterweight washers.
Why matched: Airworthiness Directives; Lycoming Engines Model IO-720-A1B Reciprocating Engines
2011-15-10
final ruleAirworthiness Directives; Superior Air Parts and Lycoming Engines (Formerly Textron Lycoming) Fuel-Injected Engines
Unsafe Condition: Diaphragms produced from specific lot numbers could have stud threads that don't meet design, incomplete braze between the stud and hub, and studs made from lower temper material. Diaphragms from t...
Why matched: Airworthiness Directives; Superior Air Parts and Lycoming Engines (Formerly Textron Lycoming) Fuel-Injected Engines
2011-13-03
final ruleAirworthiness Directives: Lycoming Engines (Type Certificate Previously Held by Textron Lycoming) and Teledyne Continental Motors (TCM) Turbocharged Reciprocating Engines
Unsafe Condition: Machining debris left in the cavities of the turbocharger center housing and rotating assembly (CHRA) during manufacture could result in seizure of the turbocharger turbine, leading to engine damag...
Why matched: Airworthiness Directives: Lycoming Engines (Type Certificate Previously Held by Textron Lycoming) and Teledyne Continental Motors (TCM) Turbocharged Reciprocating Engines
2010-07-08
final ruleAirworthiness Directives; Kelly Aerospace Energy Systems, LLC Rebuilt Turbochargers
Unsafe Condition: Separation or seizure of the turbocharger turbine due to a rough surface finish on the turbine wheel shaft exceeding allowable limits, which disrupts the hydrodynamic layer of oil between the shaft...
Why matched: Airworthiness Directives; Kelly Aerospace Energy Systems, LLC Rebuilt Turbochargers