Engine – Removal / De-Pairing
Superseded. Comply with 2018-0257, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2018-0086
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must remove one of two affected engines installed on an aircraft before both exceed their respective IPTB cyclic limits or within 20 flight cycles after 2018-07-06, whichever is later. After removal, the affected engine cannot be reinstalled unless modified according to Rolls-Royce SB TRENT 1000 72-H818, which also serves as terminating action for the directive's requirements. Compliance with the latest Rolls-Royce Alert NMSB TRENT 1000 72-AJ992 Revision 3 is mandatory.
Summary
EASA Airworthiness Directive 2018-0139 is an airworthiness directive addressing Rolls-Royce Trent 1000 series engines installed on Boeing 787 aircraft. It focuses on engines with specific serial numbers that have not incorporated Rolls-Royce Service Bulletin TRENT 1000 72-H818. The directive mandates actions to prevent engine in-flight shutdowns caused by intermediate pressure turbine blade (IPTB) sulphidation corrosion cracking.
What changed
This directive supersedes EASA AD 2018-0086 and introduces updated applicability by adding and removing specific engine serial numbers and revising IPTB cyclic life limits. It requires operators to de-pair affected engines before exceeding these limits and restricts reinstallation unless modifications per Rolls-Royce SB TRENT 1000 72-H818 are applied. The directive reflects the latest analysis and service bulletin revisions to mitigate the risk of dual engine failures.
Why it matters
For aviation professionals, this directive is critical to ensure continued airworthiness and flight safety by preventing potential engine failures due to corrosion cracking. Operators and maintenance organizations must monitor engine cyclic life limits closely and comply with de-pairing requirements to avoid in-flight shutdowns. Compliance ensures regulatory adherence and reduces operational risks associated with Trent 1000 engines on Boeing 787 aircraft.
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 2025-0206R1Engine — High Pressure Turbine Blades — InspectionDec 18, 2025
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New ADs and bulletins for Rolls-Royce Deutschland Ltd & Co Kg TRENT 1000 and Boeing 787, summarized like this page, every Monday.