EASA AD 2019-0099R2
SUPERSEDED BY EASA AD 2024-0118
Summary
EASA Airworthiness Directive 2019-0099R2 is an updated safety directive addressing the inspection and operational limitations of Rolls-Royce Trent 1000 series engines installed on Boeing 787 aircraft. It focuses on high pressure turbine (HPT) blades with specific part numbers KH10575 and KH64485, requiring repetitive borescope inspections to detect axial cracking and imposing flight cycle limits to prevent engine failure. This directive aims to mitigate risks of in-flight engine shutdown due to blade deterioration.
What Changed
EASA Airworthiness Directive 2019-0099R2 revises the previous version 2019-0099R1 by correcting the definition of 'serviceable part' to specify that only new blades installed in-shop are acceptable replacements. It deletes references to used parts that passed inspection and maintains the inspection intervals and operational limitations. This revision is considered an interim action pending further directives.
Why It Matters
This directive is critical for aviation professionals as it ensures continued airworthiness and safety of Boeing 787 aircraft powered by Trent 1000 engines by preventing potential high pressure turbine blade failures. Operators and maintenance organizations must comply with inspection and replacement requirements to avoid in-flight engine shutdowns, which could compromise flight safety and operational reliability. Compliance also ensures adherence to European Union aviation safety regulations.
What To Do
Operators must perform on-wing borescope inspections of affected HPT blades before exceeding specified flight cycle thresholds and then every 50 flight cycles thereafter. Engines accumulating 1,000 or more flight cycles or combined engine flight cycles exceeding 1,400 must be removed from service and have affected parts replaced with new blades per Rolls-Royce service instructions. Inspections must also be conducted within 10 flight cycles after any in-flight shutdown event.
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