Engine — Low Pressure Turbine Stage 1 Discs — Life Reduction
- Published
- Effective
- Deadline
- Replaces
- 2020-0059
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must remove affected Low Pressure Turbine Stage 1 discs before they reach their reduced safe cyclic limits or within two months after 16 December 2022, whichever is later. Installation of affected parts is only allowed if they have not exceeded the updated DSCL, and affected parts must be replaced with serviceable parts as required. Compliance with the updated Rolls-Royce NMSB RB.211-72-AK422 Revision 2 is mandatory.
Summary
EASA Airworthiness Directive 2022-0237 is an airworthiness directive addressing life reduction for Low Pressure Turbine Stage 1 discs on Rolls-Royce RB211-524 series engines. These engines are commonly installed on Boeing 747 and Boeing 767 aircraft. The directive mandates updated life limits and removal requirements for specific turbine discs to ensure continued airworthiness and safety.
What changed
This directive supersedes EASA AD 2020-0059 and introduces additional affected parts and revised life limits for certain reworked Low Pressure Turbine Stage 1 discs. It also incorporates a new flight profile with a higher N1 en-route limit and updates the Declared Safe Cyclic Limits (DSCL) for the affected parts as detailed in Rolls-Royce Alert Non-Modification Service Bulletin RB.211-72-AK422 Revision 2.
Why it matters
The directive is critical for operators and maintenance organizations because it addresses the risk of turbine disc failure due to operation beyond approved flight profiles and life limits. Compliance prevents potential engine in-flight shutdowns and high-energy debris release, thereby enhancing flight safety and reducing the risk of damage to the aircraft. It also ensures regulatory compliance with EASA continuing airworthiness requirements.
More for Rolls-Royce Deutschland Ltd & Co Kg RB211-524
All 5- EASA AD 2024-0069-EEngine — High Pressure Compressor / Stage 1 and 2 Rotor Path Liners — InspectionMar 12, 2024
- EASA AD 2022-0232Time Limits / Maintenance Checks — Time Limits Manual / Maintenance Programme — AmendmentNov 28, 2022
- EASA AD 2020-0059Engine – Low Pressure Turbine Stage 1 Discs – Life ReductionMar 17, 2020
- EASA AD 2018-0157Engine — Low Pressure Compressor Shafts — Life ReductionJul 24, 2018
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New ADs and bulletins for Rolls-Royce Deutschland Ltd & Co Kg RB211-524, Boeing 747 and Boeing 767, summarized like this page, every Monday.