Airworthiness DirectiveEASA AD 2018-0019

Engine — Critical Parts — Reduction of Declared Safe Cyclic Life

Published: Jan 26, 2018
Effective: Feb 9, 2018
Deadline: Feb 9, 2018

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Affected operators must identify and remove zero time parts within 100 standard duty cycles or 30 days from the effective date, whichever occurs first. Low pressure turbine shafts P/N FK14385 must be replaced before exceeding 8,800 standard duty cycles or within 100 cycles after the effective date. For engines used in non-standard operations, operators must review service utilization within 30 days and apply Beta factors as specified. Installation of zero time parts is prohibited from the effective date onward.

Summary

EASA Airworthiness Directive 2018-0019 addresses the reduction of declared safe cyclic life for critical parts of Rolls-Royce RB211 Trent 700 engines, commonly installed on Airbus A330 aircraft. The directive mandates revised life limits for low pressure turbine shafts and removal of obsolete parts to ensure continued airworthiness. It applies to all serial numbers of RB211 Trent 768-60, 772-60, 772B-60, and 772C-60 engines.

What changed

This new directive introduces a revised flight profile based on operational data, resulting in reduced declared safe cyclic lives for certain critical engine parts, specifically the low pressure turbine shaft P/N FK14385. It also sets the life of some obsolete parts to zero and requires the application of Beta factors for engines operated under non-standard operations. These changes are reflected in the updated Rolls-Royce Trent 700 Time Limits Manual and associated service bulletin.

Why it matters

For aviation professionals, this directive is crucial to prevent potential engine part failures that could compromise aircraft safety and control. Operators and maintenance organizations must adjust their maintenance planning and part replacement schedules to comply with the new life limits. Compliance ensures regulatory adherence and helps maintain the reliability and safety of Airbus A330 aircraft powered by Trent 700 engines.

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