The office of the Principal Director of Audit, Railway Production Units & Metro Railway is a subordinate office under the Comptroller & Auditor General of India with headquarters at Kolkata.
The Principal Director of Audit, Railway Production Unit & Metro Railway is responsible for the audit of accounts and various activities relating to:
- Banaras Locomotive Works, Varanasi
- Chittaranjan Locomotive Works, Chittaranjan
- Metro Railway, Kolkata
- Public Sector Undertakings (Railways)