Powerplant — Engine Drain D1 Assembly — Modification
- Published
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected AW189 helicopters must modify the engine combustion chamber D1 drain assembly by installing the new part number 8G7170P00111. This modification must be completed within 200 flight hours from the effective date of 6 March 2019, following the instructions provided in Leonardo Service Bulletin 189-200. Alternative methods of compliance may be approved if properly substantiated and authorized by EASA.
Summary
EASA Airworthiness Directive 2019-0039 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Leonardo S.p.A. AW189 helicopters. It addresses a safety issue related to the engine combustion chamber D1 drain assembly, specifically part number 8G7170A00111, installed on certain serial numbers of AW189 helicopters. The directive mandates a modification to replace the affected drain assembly to prevent potential fire hazards.
What changed
This new airworthiness directive introduces a mandatory modification requiring the replacement of the existing engine combustion chamber D1 drain assembly with a redesigned part number 8G7170P00111. The modification changes the drain routing to confine it within the engine bay, reducing the risk of heat transfer to nearby fuel system components that could ignite fuel vapors.
Why it matters
This directive is critical for aviation professionals because it addresses a potential fire risk in the fuel tank bay caused by excessive heat from the engine drain assembly. Operators and maintenance organizations must comply to ensure continued airworthiness and prevent possible catastrophic fire events. Compliance helps maintain safety standards and regulatory adherence for AW189 helicopter fleets.
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