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
Lycoming Airworthiness Directives
199 ADs indexed for Lycoming aircraft.
Models
Various
3 ADs
A-65-1
2 ADs
A-65-12
2 ADs
A-65-12F
2 ADs
A-65-12FJ
2 ADs
A-65-12J
2 ADs
A-65-14
2 ADs
A-65-14F
2 ADs
A-65-14FJ
2 ADs
A-65-14J
2 ADs
A-65-3
2 ADs
AEIO-320-E1B
2 ADs
AEIO-320-E2B
2 ADs
Various
2 ADs
Diaphragm fuel pumps
1 AD
AEIO-320-D1B
1 AD
AEIO-320-D2B
1 AD
AEIO-320-E1A
1 AD
AEIO-320-E1B
1 AD
AEIO-320-E2A
1 AD
AEIO-320-E2B
1 AD
AEIO-360-B1B
1 AD
AEIO-360-B1D
1 AD
AEIO-360-B1F
1 AD
AEIO-360-B1F6
1 AD
LTIO-540-J2BD
1 AD
Magnetos
1 AD
TIO-540-J2BD
1 AD
AIO-320-A1A
1 AD
AIO-320-A1B
1 AD
AIO-320-A2A
1 AD
AIO-320-A2B
1 AD
AIO-320-B1B
1 AD
AIO-320-C1B
1 AD
AIO-360-A1A
1 AD
AIO-360-A1B
1 AD
AIO-360-A2A
1 AD
Fuel Injectors
1 AD
IO-720-B1BD
1 AD
IO-720-D1CD
1 AD
Magnetos
1 AD
TIO-540-F2BD
1 AD
TIO-540-N2BD
1 AD
TIO-540-R2AD
1 AD
O-470-11
1 AD
O-470-11-CI
1 AD
O-470-11B
1 AD
O-470-11B-CI
1 AD
O-470-13
1 AD
O-470-13A
1 AD
O-470-15
1 AD
O-470-2
1 AD
O-470-4
1 AD
O-470-A
1 AD
GTSIO-520-L
1 AD
GTSIO-520-M
1 AD
GTSIO-520-N
1 AD
LTIO-540-J2B
1 AD
TSIO-520-AF
1 AD
TSIO-520-CE
1 AD
TSIO-520-P
1 AD
TSIOL-550-A
1 AD
TSIOL-550-C
1 AD
Turbochargers
1 AD
A-65-1
1 AD
A-65-12
1 AD
A-65-12F
1 AD
A-65-12FJ
1 AD
A-65-12J
1 AD
A-65-14
1 AD
A-65-14F
1 AD
A-65-14FJ
1 AD
A-65-14J
1 AD
A-65-3
1 AD
GO-300-A
1 AD
GO-300-B
1 AD
GO-300-C
1 AD
GO-300-D
1 AD
GO-300-E
1 AD
GO-300-F
1 AD
O-470-11
1 AD
O-470-11-CI
1 AD
O-470-11B
1 AD
O-470-11B-CI
1 AD
AEIO-360-B1B
1 AD
AEIO-360-B1D
1 AD
AEIO-360-B1F
1 AD
AEIO-360-B1F6
1 AD
AEIO-360-B1G6
1 AD
AEIO-360-B2F
1 AD
AEIO-360-B2F6
1 AD
AEIO-360-B4A
1 AD
AEIO-360-H1A
1 AD
Reciprocating Engine Connecting Rods
1 AD
AEIO-320-D1B
1 AD
AEIO-320-D2B
1 AD
AEIO-320-E1A
1 AD
AEIO-320-E1B
1 AD
AEIO-320-E2A
1 AD
AEIO-320-E2B
1 AD
AEIO-360-B1B
1 AD
AEIO-360-B1D
1 AD
AEIO-360-B1F
1 AD
Reciprocating Engine Cylinder Assemblies
1 AD
IO-540-K1A5
1 AD
IO-540-K1B5
1 AD
IO-540-K1G5
1 AD
O-540-B2B5
1 AD
O-540-B2C5
1 AD
O-540-E4B5
1 AD
O-540-E4C5
1 AD
O-540-G1A5
1 AD
O-540-G2A5
1 AD
Carburetors
1 AD
O-235-C1C
1 AD
O-235-H2C
1 AD
O-235-L2A
1 AD
O-235-L2C
1 AD
O-235-N2C
1 AD
O-235-P1
1 AD
Carburetors
1 AD
O-540-L3C5D
1 AD
AEIO-320-D1B
1 AD
AEIO-320-D2B
1 AD
AEIO-320-E1A
1 AD
AEIO-320-E2A
1 AD
AEIO-360-A1A
1 AD
AEIO-360-A1B
1 AD
AEIO-360-A1B6
1 AD
AEIO-360-A1C
1 AD
AEIO-360-B1G6
1 AD
AEIO-360-H1A
1 AD
O-235-C2C
1 AD
O-235-H2C
1 AD
O-235-K2C
1 AD
O-235-L2C
1 AD
O-320-A2D
1 AD
O-320-D1D
1 AD
AEIO-320-D1B
1 AD
AEIO-320-D2B
1 AD
AEIO-320-E1A
1 AD
AEIO-320-E1B
1 AD
AEIO-320-E2A
1 AD
AEIO-320-E2B
1 AD
AEIO-360-B1B
1 AD
AEIO-360-B1D
1 AD
AEIO-360-B1F
1 AD
AEIO-360-B1F6
1 AD
IO-360-A1A
1 AD
IO-360-A1B
1 AD
IO-360-A1B6
1 AD
IO-360-A1B6D
1 AD
IO-360-A1C
1 AD
IO-360-A1D
1 AD
IO-360-A1D6
1 AD
IO-360-A1D6D
1 AD
IO-360-A2A
1 AD
IO-360-A2B
1 AD
AEIO-540-D4A5
1 AD
AEIO-540-D4B5
1 AD
AEIO-540-D4C5
1 AD
AEIO-540-D4D5
1 AD
AEIO-540-L1B5
1 AD
AEIO-540-L1B5D
1 AD
AEIO-540-L1D5
1 AD
HIO 540-A1A
1 AD
IO-540-A1A5
1 AD
IO-540-AA1A5
1 AD
Various
1 AD
Recent ADs
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