EASA AD CF-2023-30
Engine — High Pressure Turbine 1st / 2nd Stage Disks - Suspected Material Defect
Summary
Canadian Airworthiness Directive CF-2023-30 addresses suspected material defects in the high pressure turbine (HPT) 1st and 2nd stage disks of Pratt & Whitney Canada PW307A and PW307D engines. This directive follows an uncontained HPT disk failure event in an Airbus A321-231 powered by a related engine model. It mandates removal and replacement of specific affected HPT disks to prevent potential engine damage and ensure continued airworthiness.
What Changed
CF-2023-30 introduces mandatory removal and replacement of certain HPT disks identified by part and serial numbers in PW307A and PW307D engines. It prohibits reinstallation of these affected disks and sets compliance deadlines for removal either by January 31, 2027, or at the next engine disassembly opportunity. This is a new directive responding to a material defect risk rather than an amendment to previous regulations.
Why It Matters
This directive is critical for operators and maintenance organizations to prevent uncontained failures that could lead to engine damage and safety hazards. Compliance ensures continued airworthiness and regulatory adherence, reducing the risk of in-flight engine incidents. Maintenance teams must track affected parts and plan timely replacements to avoid operational disruptions.
What To Do
Operators must remove and replace affected HPT disks listed in the directive by January 31, 2027, or at the next engine disassembly if the disks are listed in the secondary tables. Affected disks are not eligible for reinstallation after the directive's effective date. Compliance must follow the instructions in P&WC Service Bulletin PW300-72-47256 or its approved revisions.
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