Exact General Electric CT7-8A1 turboshaft variant in the CT7-8 family. FAA airworthiness rules identify the CT7-8A1 model and its affected serial-number range, while GE Aerospace current technical documentation dated August 1, 2026 lists CT7-8A1 in the operating and installation manual set, supporting ongoing technical support. No unsupported aircraft installation or model-specific performance value is inferred here.