An Illustrated Parts Catalog (IPC) is a detailed, visual database that contains comprehensive information about the parts and components of an aircraft or system. It is typically published by the manufacturer or supplier and serves as a reference guide for maintenance, repair, and overhaul (MRO) operations.

The IPC usually includes:

1. Detailed diagrams and illustrations of each part and assembly
2. Part numbers, descriptions, and nomenclature
3. Quantities and location of each part within the aircraft or system
4. Information on part interchangeability and substitution
5. Materials, dimensions, and tolerances for each part

The IPC is an essential tool for maintenance personnel, technicians, and engineers, as it helps them to:

1. Identify and order the correct parts for maintenance and repair
2. Understand the assembly and disassembly of complex systems
3. Troubleshoot and diagnose problems
4. Perform inspections and routine maintenance tasks

Overall, the Illustrated Parts Catalog is a critical resource for ensuring the accuracy, efficiency, and safety of maintenance operations.