This document discusses the maintenance schedules and processes for different types of coaches in India. It provides the following key details: 1. Coaches are classified as minor, medium or major depending on their capacity of 50-100, 100-250, or above 250 passengers respectively. 2. Maintenance depots are categorized as integral coach factory (ICF), rail coach factory (RCF), link holfmann bushh (LHB), or hybrid depending on the coach design and components. 3. Regular maintenance includes washing after every trip and sick line maintenance on monthly, quarterly, or 6 month schedules depending on the coach category. 4. The sick line workshop performs repairs and overhauls like