37 results found (2270ms)
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: Wear on the No. 3 bearing spring finger housing can lead to high levels of non-synchronous vibration (NSV), which could induce high-pressure compressor (HPC) stall.
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: aborted takeoffs after engines did not advance to the desired takeoff fan speed due to icing in the pressure sensor line, which, if not addressed, could result in loss of engine thrust control and ...
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: cracks in the high-pressure turbine (HPT) rotor stage 1 blades
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: fracture and subsequent uncontained failure of certain HPT rotor stage 1 disks and a certain compressor rotor stages 6-10 spool due to material properties reduced by iron inclusion
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: The unsafe condition on these products is the potential for HPT stage 1 disks, forward outer seals, and compressor rotor stages 6-10 spools to have reduced material properties due to iron inclusion...
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: a quality escape for certain low-pressure turbine (LPT) disks made from forgings with nonconforming grain size
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: The aft arm of the high-pressure turbine (HPT) rotor interstage seal had failed due to a non-conforming surface condition in the fillet area coupled with higher-than-expected operating stress due t...
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: A quality escape involving certain high-pressure compressor (HPC) stage 2 seals manufactured without detailed finish machining, which could result in deeper rubs and mechanical damage to the seal t...
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: Loss of thrust control during go-around due to significantly higher than expected fuel nozzle coking creating back pressure in the fuel system, triggering the fuel pump relief valve to open and red...
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: Detection of melt-related freckles in the billet, which may reduce the life of certain high-pressure turbine (HPT) rotor interstage seals.
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: Wear on the No. 3 bearing spring finger housing can lead to high levels of non-synchronous vibration (NSV), which could induce high-pressure compressor (HPC) stall.
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: Electrical arcing on certain life-limited critical parts, including CDP seals, HPC stage 3 disks, and HPT rear shafts, could result in premature fracture, uncontained part release, engine damage, a...
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Engines
Unsafe Condition: Wear on the No. 3 bearing spring finger housing can lead to high levels of non-synchronous vibration (NSV), which could induce high-pressure compressor (HPC) stall.
Why matched: Airworthiness Directives; CFM International, S.A. Engines
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Unsafe Condition: Cracks found in the rotating air HPT front seal.
Why matched: Airworthiness Directives; CFM International, S.A. Turbofan Engines
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Unsafe Condition: non-synchronous vibrations resulting in more open clearances and potential hot gas ingestion into the high-pressure turbine (HPT) rotor cavity, which may result in thermal degradation of the HPT ro...
Why matched: Airworthiness Directives; CFM International, S.A. Turbofan Engines
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Unsafe Condition: The presence of iron inclusion in the HPT stage 1 disks and stages 6-10 compressor rotor spool could lead to premature fracture and uncontained failure, which indicates an immediate safety of fligh...
Why matched: Airworthiness Directives; CFM International, S.A. Turbofan Engines
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Unsafe Condition: The detection of melt-related freckles in the billet, which may reduce the life of certain compressor rotor stages 6-10 spools, high pressure turbine (HPT) rotor mid seals, HPT rotor stage 2 disks,...
Why matched: Airworthiness Directives; CFM International, S.A. Turbofan Engines
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Unsafe Condition: The detection of melt-related freckles in the billet, which may reduce the life of certain compressor rotor stages 6-10 spools, high pressure turbine (HPT) rotor interstage seals, HPT rotor stage 2...
Why matched: Airworthiness Directives; CFM International, S.A. Turbofan Engines
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Unsafe Condition: loss of engine oil while in flight, which could result in engine failure, loss of thrust control, reduced control of the aircraft, and damage to the airplane.
Why matched: Airworthiness Directives; CFM International, S.A. Turbofan Engines
Airworthiness Directives; CFM International S.A. Turbofan Engines
Unsafe Condition: cracks found in the rotating air HPT front seal on CFM56-5B model turbofan engines during a scheduled shop visit, resulting from variations in the geometry of the parts being mated.
Why matched: Airworthiness Directives; CFM International S.A. Turbofan Engines
Airworthiness Directives; CFM International S.A. Turbofan Engines
Unsafe Condition: inadequate oil flow to the radial drive shaft (RDS) bearing, which caused the RDS bearing cage to fail
Why matched: Airworthiness Directives; CFM International S.A. Turbofan Engines
Airworthiness Directives; CFM International S.A. Turbofan Engines
Unsafe Condition: A fractured fan blade leading to the engine inlet cowl disintegrating and debris penetrating the fuselage, causing a loss of pressurization and prompting an emergency descent.
Why matched: Airworthiness Directives; CFM International S.A. Turbofan Engines
Airworthiness Directives; CFM International S.A. Turbofan Engines
Unsafe Condition: Icing in the pressure sensor lines, inaccurate pressure sensor readings, failure of one or more engines, loss of thrust control, and loss of the airplane.
Why matched: Airworthiness Directives; CFM International S.A. Turbofan Engines
Airworthiness Directives; CFM International S.A. Turbofan Engines
Unsafe Condition: The unapproved welds on high-pressure turbine (HPT) cases installed on CFM LEAP-1B turbofan engines reduced the material capability of these cases, which requires their removal prior to reaching th...
Why matched: Airworthiness Directives; CFM International S.A. Turbofan Engines
Airworthiness Directives; CFM International S.A. Turbofan Engines
Unsafe Condition: Icing in the pressure sensor lines and inaccurate pressure sensor readings, failure of one or more engines, loss of thrust control, and loss of the airplane.
Why matched: Airworthiness Directives; CFM International S.A. Turbofan Engines