GE's combined T58/CT58 designation family preserves the historical military T58 and civil CT58 branches as one cross-designation record. GE records the T58's 1957 first flight and production through 1984, while the current CT58 manual index preserves ongoing civil support documentation. The exact S-62A CT58-110-1 and S-62C/HH-52A T58-GE-8 installations remain here as suffix-specific alternatives; dedicated T58 and CT58 family/model records carry their own technical and lifecycle boundaries.