Engine — High Pressure Turbine Blades — Inspection
- Published
- Effective
- Replaces
- 2024-0118R1
- Replaces
- 2025-0206
- Replaces
- 2024-0118
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial and repetitive borescope inspections of the HPT blades within specified flight cycle intervals, following Rolls-Royce Alert NMSB TRENT 1000 72-AK316 Revision 6 instructions. If cracks are detected beyond defined limits, engines must be removed from service and blades replaced before further flight. Optional terminating action includes modifying engines per Rolls-Royce SB TRENT 1000 72-K335. Compliance deadlines include inspections before exceeding 550 flight cycles or within 50 flight cycles after 6 October 2025, and follow-on inspections every 10 flight cycles if cracks are found.
Summary
EASA Airworthiness Directive 2025-0206R1 is a regulatory update concerning the inspection of high pressure turbine (HPT) blades on Rolls-Royce Trent 1000 engines installed on Boeing 787 aircraft. It mandates repetitive on-wing borescope inspections of specific HPT blades to detect cracks and requires corrective actions including engine removal and blade replacement if cracks exceed defined limits. The directive applies to multiple Trent 1000 engine variants and aims to ensure continued airworthiness and safety.
What changed
EASA Airworthiness Directive 2025-0206R1 revises the previous AD 2025-0206 by excluding engines from inspection requirements when the opposite engine was deliberately shut down and immediately restarted during standard airplane acceptance tests. It also updates inspection thresholds, removes certain life limits, and clarifies inspection and corrective action procedures based on new Rolls-Royce service information and operational experience.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential high pressure turbine blade failures that could lead to engine in-flight shutdowns and reduced aircraft control. Compliance ensures early detection of blade cracking, maintaining engine reliability and safety. It also provides clarity on inspection requirements during specific test conditions, reducing unnecessary maintenance actions.
More for Rolls-Royce Deutschland Ltd & Co Kg TRENT 1000
All 59- EASA PAD 26-114Engine – High Pressure Turbine Blades – InspectionSep 24, 2026
- EASA AD 2026-0117R1Engine – Low Pressure Turbine Discs – InspectionAug 12, 2026
- EASA AD 2026-0143Engine – Intermediate Pressure Compressor Shaft Assembly / Front Air Seal – InspectionJul 20, 2026
- EASA AD 2026-0117Engine – Low Pressure Turbine Discs – InspectionJun 19, 2026
- EASA AD 2025-0233Engine — High-Pressure Compressor / Mini-Disc Anti-Rotation Block — Inspection / Modification
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