Engine – Removal / De-Pairing
Superseded. Comply with 2018-0139, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2017-0253-E
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 2018-05-01, whichever is later. After removal, the engine cannot be reinstalled except under specified limitations. Modification of affected engines per Rolls-Royce Service Bulletin TRENT 1000 72-H818 is considered terminating action for these requirements.
Summary
EASA Airworthiness Directive 2018-0086 is an airworthiness directive addressing Rolls-Royce Trent 1000 series engines installed on Boeing 787 aircraft. It focuses on preventing intermediate pressure turbine blade (IPTB) failures caused by sulphidation corrosion cracking, which could lead to in-flight engine shutdowns. The directive mandates specific engine removal and de-pairing procedures to mitigate this risk.
What changed
This directive supersedes the previous Emergency AD 2017-0253-E and updates the applicability by adding and removing certain engine serial numbers. It introduces new cyclic life limits for IPTBs and requires operators to de-pair affected engines before exceeding these limits or within 20 flight cycles after the effective date. Additionally, it recognizes a Rolls-Royce service bulletin as terminating action for the AD requirements.
Why it matters
Compliance with EASA Airworthiness Directive 2018-0086 is critical to prevent potential engine failures due to corrosion cracking, which can cause in-flight shutdowns and compromise aircraft safety. Operators and maintenance organizations must manage engine pairing and life limits carefully to avoid dual engine shutdown risks. This directive ensures continued airworthiness and regulatory compliance for affected Boeing 787 aircraft equipped with Trent 1000 engines.
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.