NS 9446
| Uprated from 4,000 to 4,400 horsepower |
C40-9W
| 52355 | 2 | 32896 |
NS 9723
| Uprated from 4,000 to 4,400 horsepower. Sold to FXE |
C44-9W
| 53428 | 1 | 207177 |
NS 9855
| Uprated from 4,000 to 4,400 horsepower Blt 3-2004, order/Frame # 1972-43, |
C44-9W
| 55013 | 1 | 209387 |
NS 9923
| Built,Oct. 2004, placed inService Oct 17, 2004 order/frame # 1972 |
C44-9W
| 55369 | 2 | 207551 |
NS 9940
| Rerated to 4400 HP 11/2013 |
C44-9W
| 55386 | 3 | 192035 |