Engine — High Pressure Turbine — 2nd-Stage Disk with Suspected Material Defect
- Published
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- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Pratt & Whitney Canada PW307D engines with the specified HPT 2nd-stage disks must remove these disks from service within 100 engine cycles from June 23, 2022. The removed disks must not be reinstalled on any engines. Maintenance personnel should follow the removal procedures outlined in the PW307D Overhaul Manual.
Summary
Airworthiness Directive CF-2022-31 is issued by Transport Canada concerning Pratt & Whitney Canada PW307D engines installed with specific high pressure turbine (HPT) 2nd-stage disks suspected of having a material defect. The directive applies to disks with part number 30P3182-01 and serial numbers A004D8X1 and A004E9K3. This AD addresses a potential safety risk related to uncontained HPT disk failure that could lead to engine damage and compromised aircraft safety.
What changed
This new Airworthiness Directive introduces mandatory removal of the affected HPT 2nd-stage disks from service within 100 engine cycles from the effective date. It prohibits reinstallation of the identified disks on any engines and provides specific instructions for removal referencing the PW307D Overhaul Manual.
Why it matters
This directive is critical for aviation professionals because it mitigates the risk of uncontained engine failures caused by subsurface material defects in turbine disks. Operators and maintenance organizations must ensure compliance to prevent potential engine damage and ensure continued airworthiness and safety of affected aircraft. Failure to comply could result in serious safety incidents and regulatory penalties.
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