EASA AD 2018-0086
SUPERSEDED BY EASA AD 2018-0139
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.
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.
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.