Engine — Power Turbine Disc — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2019-0061
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect affected power turbine discs on Group 1 engines before specified cycle limits or at the next engine shop visit after April 1, 2019, and replace any damaged or non-conforming parts before next flight. Group 2 engines require replacement of affected parts within specified compliance times outlined in the directive, while Group 3 engines must replace affected parts within 60 months or at the next engine shop visit after June 22, 2017. Installation of affected parts is prohibited after compliance actions. Compliance deadlines vary by engine group and are detailed in the directive.
Summary
EASA Airworthiness Directive 2019-0143 is an airworthiness directive addressing inspection and replacement of power turbine discs on GE Aviation Czech M601 series engines. It applies to multiple M601 engine variants installed on aircraft such as the Aircraft Industries L-410 series, Air Tractor AT series, Allied Ag Cat G-164 series, PZL-106 Kruk, RUAG Do 28 series, and Thrush S-2R series. The directive mandates inspections and replacement of certain power turbine discs identified by part and serial numbers to ensure continued safe operation.
What changed
EASA Airworthiness Directive 2019-0143 supersedes AD 2019-0061 and introduces amended compliance times specifically for Group 2 engines regarding the replacement of affected power turbine discs. It retains previous inspection and replacement requirements but adjusts deadlines to enhance safety and compliance clarity. The directive also consolidates prior requirements from earlier ADs related to this unsafe condition.
Why it matters
This directive is critical for aviation professionals as it addresses a potential unsafe condition involving power turbine disc damage or non-conformity that could lead to disc failure and release of high-energy debris. Compliance ensures the structural integrity of the engine and prevents possible damage or loss of aircraft control. Operators, maintenance organizations, and compliance teams must adhere to these requirements to maintain airworthiness and regulatory compliance.
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