| LOCOMOTIVE NUMBER | | DEPOT | | | | DATES | |
| 40166 | | | | | | 02/01/79 - 22/01/80 | |
| | | | | | | | |
| | | DATE ON DEPOT | DATE OFF DEPOT | TOPS CODE | | RECORD OF MAINTENANCE REQUIREMENTS AND ATTENTION GIVEN | DEPOT |
| | | 02/01/79 | | 510 | | Batteries | SP |
| | | | 26/01/79 | | | AX | NH |
| | | | 02/02/79 | | | AX | SP |
| | | 09/02/79 | 09/02/79 | XAM | | BX. No2 RHS buffer changed | SP |
| | | 24/03/79 | | 350 | | Brake rigging | Millerhill |
| | | | 02/04/79 | | | AX | NH |
| | | 04/04/79 | | 538 | | Load regulator | HO |
| | | 04/04/79 | | 538 | | Load regulator | HM |
| | | | 11/04/79 | | | AX | BX |
| | | 18/04/79 | 30/04/79 | XAM | | CX | RS |
| | | | 17/05/79 | | | AX | LO |
| | | | 02/06/79 | | | AX | NW |
| | | | 06/06/79 | | | AX | NW |
| | | | 12/06/79 | | | AX | EG |
| | | | 17/06/79 | | | BX & BBL | NH |
| | | 20/06/79 | | LOP | | Loss of power | KD |
| | | | 08/08/79 | | | AX. To LO for fuel tank repairs | KM |
| | | | 27/08/79 | | | BX & BBL. Main fuel tank repairs | RS |
| | | 12/09/79 | | HOT | | High water temperature | KD |
| | | | 02/10/79 | | | AX | NR |
| | | | 09/10/79 | | | AX | KM |
| | | | 20/10/79 | | | AX | KM |
| | | 26/10/79 | 07/11/79 | XAM | | CX | LO |
| | | | 23/11/79 | | | AX & BBL | BC |
| | | | 29/11/79 | | | AX | BC |
| | | | 13/12/79 | | | BX | KM |
| | | | ? | | | AX | LO |
| | | 03/01/80 | 04/01/80 | 300 | | Brake system | LO |
| | | | 11/01/80 | | | AX & BBL | LO |
| | | 22/01/80 | | WTR | | Tyre turning | RS |