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:

  1. Banaras Locomotive Works, Varanasi
  2. Chittaranjan Locomotive Works, Chittaranjan
  3. Metro Railway, Kolkata
  4. Public Sector Undertakings (Railways) 
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