EASA Regulations for Pratt & Whitney PW4100

4 airworthiness directives and regulations affecting Pratt & Whitney PW4100.

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New ADs and bulletins for Pratt & Whitney PW4100, summarized like the ones below, every Monday.

EASA AD US-2021-22-14

Dec 10, 2021

Engine - Low-Pressure Turbine - Replacement / Inspection

Airworthiness Directive 2021-22-14 is a final rule issued by the FAA addressing certain Pratt & Whitney PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 turbofan engines. It mandates replacement and inspection requirements for the low-pressure turbine (LPT) 4th-stage air sealing ring segment assemblies and the LPT case to prevent unsafe conditions. This directive aims to enhance engine safety by addressing issues that could lead to blade fractures and engine damage.

Airworthiness Directive
  • Pratt & Whitney PW4100

EASA AD US-2021-05-16

Apr 6, 2021

Superseded by FAA AD 2021-22-14

FAA Airworthiness Directive 2021-05-16 is a final rule affecting Pratt & Whitney PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 turbofan engines equipped with specific low-pressure turbine (LPT) 4th-stage air sealing ring segment assemblies. This directive addresses unsafe conditions caused by LPT 4th-stage vane cluster assemblies leaning back and damaging rotating blades, which can lead to blade fractures and releases. The AD mandates inspections and replacements to ensure engine safety and reliability.

Airworthiness Directive
  • Pratt & Whitney PW4100

EASA AD US-2020-25-09

Dec 11, 2020

Engine - 3rd Stage Low-pressure Turbine Duct Segments - Removal / Replacement

Federal Aviation Administration Airworthiness Directive 2020-25-09 is a final rule addressing Pratt & Whitney Division PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 model turbofan engines equipped with the Talon IIB outer combustion chamber assembly and certain 3rd stage low-pressure turbine duct segments. This directive mandates the removal and replacement of specific 3rd stage LPT duct segments due to reports of damage and failure that have caused engine surges and in-flight shutdowns. The AD aims to mitigate the unsafe condition associated with elevated gas path temperatures and component distortion.

Airworthiness Directive
  • Pratt & Whitney PW4100

EASA AD US-2019-06-07

Mar 29, 2019

Engine Fuel & Control - Fuel Nozzles and Supply Manifold Assemblies - Inspection / Replacement / Modification

The Federal Aviation Administration's Airworthiness Directive 2019-06-07 addresses certain Pratt & Whitney PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 turbofan engines. This directive mandates inspections and replacements related to fuel nozzles and fuel nozzle supply manifold assemblies to prevent fuel leaks associated with the Talon IIB combustion chamber configuration. It also requires installation of new brackets and clamps on the fuel nozzle supply manifold assemblies.

Airworthiness Directive
  • Pratt & Whitney PW4100