EASA AD 2025-0171R2
Engine – High Pressure Turbine Rotor Stage 1 Blade – Inspection
Summary
EASA Airworthiness Directive 2025-0171R2 is an updated regulatory requirement addressing inspections of high pressure turbine (HPT) rotor stage 1 blades on CFM International LEAP-1A engines installed on certain Airbus A319, A320, and A321 aircraft. The directive mandates repetitive borescope inspections of specific affected turbine blades to detect cracks and prevent potential in-flight engine failures. It applies to multiple LEAP-1A engine variants and specifies affected part numbers for inspection and corrective actions.
What Changed
This revision of EASA AD 2025-0171R2 updates the previous AD 2025-0171R1 by removing the requirement to inspect the second engine on twin-engine aircraft if it has accumulated a low number of cycles. It also corrects the compliance time for inspections and references an updated service bulletin issue. These changes refine inspection thresholds and clarify inspection applicability to reduce unnecessary inspections.
Why It Matters
This directive is critical for aviation professionals to ensure the continued airworthiness and safety of aircraft powered by LEAP-1A engines, particularly those operating in the South Asian region where cracked turbine blades have been reported. Operators and maintenance organizations must comply to prevent engine failures that could lead to in-flight shutdowns and compromised aircraft control. Accurate compliance reduces operational disruptions and enhances safety management.
What To Do
Operators must perform repetitive borescope inspections of affected HPT rotor stage 1 blades according to the specified thresholds based on engine group and accumulated critical departures. If cracks or discrepancies are found, corrective actions including engine removal and repair must be taken promptly. Replacement of affected blades with serviceable parts terminates the inspection requirements. Compliance deadlines depend on engine cycles and critical departure counts, with initial inspections required within 100 cycles after 11 August 2025 or before exceeding specified cycle limits.
Your fleet's weekly compliance brief
AI-summarized regulatory changes, compliance deadlines, and action items — filtered to your aircraft, every Monday.
AI-generated summary from official EASA source document. Always verify against the original.