86 results found (960ms)
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Unsafe Condition: Turbine exhaust frames manufactured from a certain material are less durable and more susceptible to developing cracks under thermal stress.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Unsafe Condition: Circumferential cracks at the turbine exhaust frame external surface caused by thermal stress from engine starts.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Unsafe Condition: crack, fracture, missing, or loosening of the gas generator case to turbine support case retaining bolts due to inadequate low-cycle fatigue life
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Unsafe Condition: There has been a recent in-service report of a PT2 blade failure on a model PT6A-67 engine and two reports of PT2 blade failures during testing at the manufacturer's facility. The PT2 blade failure...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Unsafe Condition: Failure of the high-pressure turbine (HPT) 1st and 2nd-stage disks, potentially due to undetected subsurface material defects, which could result in uncontained HPT disk failure, engine damage, air...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Unsafe Condition: The unsafe condition, if not addressed, could result in uncontained HPT disk failure, damage to the engine, damage to the airplane, and loss of the airplane.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Engines
Airworthiness Directives; Pratt & Whitney Canada Corporation Turbofan Engines
Unsafe Condition: The combustion chamber outer case (CCOC) to rear compressor case (RCC) flange bolt low cycle fatigue life was inadequate and those flange bolts may develop cracks resulting in flange bolt fracture.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corporation Turbofan Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turbofan Engines
Unsafe Condition: Crack originating from machining marks on the back face of the impeller, propagating until the impeller fractures, leading to uncontained failure.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turbofan Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: Engines failing to achieve required power (torque) during high power applications due to internal leaks in the bleed-off valves (BOVs) caused by glass bead contamination.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: low-time fractures of compressor turbine (CT) blades resulting in loss of power or in-flight shutdown (IFSD) of the engine due to airflow distortion and subsequent aerofoil excitation of the CT bla...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Unsafe Condition: The Automated Damage Tracking System (ADTS) may under-count the number of cycles accrued by the impeller and the High Pressure (HP) compressor rotor.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Unsafe Condition: Contamination from galvanic corrosion between the fuel control unit (FCU) aluminum body and the steel union fitting causing the loss of engine control, resulting in an engine over-speed condition a...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: certain HP centrifugal impellers installed on P&WC PW150A model turboprop engines may exhibit a material microstructure anomaly that has a potential to adversely affect the low cycle fatigue charac...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Unsafe Condition: Reports of incorrect engine torque for PT6B-37A turboshaft engines due to axial migration of the #9 and #10 bearings at the engine torque sensing gear location.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: incidents of corrosion and perforation of the two-ply Cu-Be bellows in Woodward fuel control units (FCUs)
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: fuel seepage past the metal-to-metal sealing surfaces of the fuel nozzle and fuel manifold flow adapter
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Unsafe Condition: Axial migration of the No. 10 bearing in the engine reduction gearbox (RGB) assembly, caused by non-optimal bearing internal clearance, which could lead to engine overtorque, failure of the engine,...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: Failure of compressor turbine (CT) blades could result in damage to the engine and damage to the airplane.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: Failure of compressor turbine (CT) blades, which could result in damage to the engine and damage to the airplane.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: Compressor turbine (CT) blade failure due to creep and/or sulfidation, leading to power loss and engine failure.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corporation Turboprop Engines
Unsafe Condition: Damage to the high-pressure fuel line from the P&WC PW150A engine flowmeter to the flow divider, caused by fretting wear through contact with incorrectly routed igniter cables, could result in a hi...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corporation Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: Reports of fuel leaks at the interface between the fuel manifold and the fuel nozzle that resulted in engine fire.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: In-service events involving the perforation of engine cases as a result of the liberation of power turbine (PT) blades and the fracture/displacement of the PT containment ring.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Unsafe Condition: Fractures of the first-stage power turbine (PT) blade due to undetected shrinkage porosity of unacceptable levels within the blade casting.
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Airworthiness Directives; Pratt & Whitney Canada Corp Turboshaft Engines
Unsafe Condition: Failure of the retaining ring that holds the power turbine (PT) baffle in its intended position, leading to PT baffle displacement and contact with the downstream side of the second stage PT disk, ...
Why matched: Airworthiness Directives; Pratt & Whitney Canada Corp Turboshaft Engines