| Number | Class | Built Date | Renumbered | Retired | Notes |
|---|---|---|---|---|---|
| 2500 | MR-20a | 1973 | to 3500 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2501 | MR-20a | 1973 | to 3501 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2502 | MR-20a | 1973 | to 3502 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2503 | MR-20a | 1973 | to 3503 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2504 | MR-20a | 1973 | to 3504 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2505 | MR-20a | 1973 | to 3505 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2506 | MR-20a | 1973 | to 3506 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2507 | MR-20a | 1973 | to 3507 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2508 | MR-20a | 1973 | to 3508 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2509 | MR-20a | 1973 | to 3509 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2510 | MR-20a | 1973 | to 3510 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2511 | MR-20a | 1973 | 2 February 1982 | wide nose lead unit in head-on collision near St. Andre QC, 25 September 1981 | |
| 2512 | MR-20a | 1973 | to 3512 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2513 | MR-20a | 1973 | to 3513 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2514 | MR-20a | 1973 | to 3514 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2515 | MR-20a | 1973 | to 3515 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2516 | MR-20a | 1973 | to 3516 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2517 | MR-20a | 1973 | to 3517 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2518 | MR-20a | 1973 | to 3518 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2519 | MR-20a | 1973 | to 3519 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2520 | MR-20a | 1973 | to 3520 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2501 | MR-20a | 1973 | to 3521 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2522 | MR-20a | 1973 | to 3522 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2523 | MR-20a | 1973 | to 3523 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 | |
| 2524 | MR-20a | 1973 | to 3524 in 1986-87 | wide nose weight and fuel capacity reduced, in 1986-87 |