EASA AD 2019-0241R1
Engine — High Pressure Compressor and High Pressure Turbine Rotating Parts — Life Limit Reduction / Replacement
Summary
EASA Airworthiness Directive 2019-0241R1 is a regulatory update addressing life limit reductions and replacement requirements for high pressure compressor and high pressure turbine rotating parts on Powerjet SaM146 engines, which are commonly installed on Sukhoi RRJ-95B aircraft. This directive applies to all serial numbers of SaM146-1S17, SaM146-1S17C, SaM146-1S18, and SaM146-1S18C engine models. It mandates compliance with updated life limits to ensure continued airworthiness and safety.
What Changed
EASA Airworthiness Directive 2019-0241R1 revises the original AD 2019-0241 by adding an additional affected part with a newly approved reduced life limit. It incorporates extended life limits for both affected and non-affected parts as published in the latest revision of Powerjet Service Bulletin 72-0227. The revision maintains the requirement to replace affected parts before exceeding their specific life limits and retains installation conditions for these parts.
Why It Matters
This directive is critical for aviation professionals as it addresses a potential unsafe condition that could lead to engine failure and release of high energy debris, risking aircraft damage and loss of control. Operators and maintenance organizations must adhere to the updated life limits to prevent in-service failures and ensure regulatory compliance. The directive also clarifies installation rules for affected parts, aiding in maintenance planning and parts management.
What To Do
Operators and maintenance providers must replace each affected high pressure compressor and turbine rotating part before it exceeds the life limits specified in Powerjet Service Bulletin 72-0227. Installation of affected parts is permitted only if the parts have not exceeded their life limits and must be followed by replacement within the prescribed limits. Compliance with these requirements must be ensured as soon as possible, following the effective date of 6 December 2021.
AI-generated summary from official EASA source document. Always verify against the original.