Incident Overview
Shortly after takeoff, the left engine suffered an uncontained failure of the Stage 1 High Pressure Turbine (HPT). The flight crew executed a safe return and performed a precautionary landing. No further details about the aircraft, operator, or location were provided.
Investigation Findings
Subsequent examination of the engine revealed that the HPT disk blade retention lug had separated because of a low cycle fatigue fracture. This finding pinpointed the root cause of the uncontained failure.
Regulatory Actions
In response to this failure, two corrective actions were issued. Pratt & Whitney released Service Bulletin PW2000 A72-592, and an Airworthiness Directive, TAD 97-11-51T, was published. These documents address the identified issue in this and other Pratt and Whitney engines, aiming to prevent similar occurrences.
Conclusion
The incident proceeded without further escalation, as the aircraft landed without additional reported issues. The issued service bulletin and airworthiness directive serve as mandated measures to ensure continued safe operation of affected engines.