हमारे बारे में
| 1969 |
The Office of the Chief Auditor, Railway Production Units was set up for the audit of accounts and records of:
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| 1st October, 1974 | Audit of Metro Railway, Kolkata was entrusted to this office. |
| March, 1990 | The office was renamed as Office of the Principal Director of Audit, Railway Production Units & Metro Railway. |
| 5th June, 1997 | Audit jurisdiction of ICF, Perambur came under Principal Director of Audit, Southern Railway, Chennai |