Which document details components that need repair?

The Integrated Component Repair List (ICRL) is the correct document for detailing the components that need repair. It serves as a vital resource for maintenance and logistics by outlining which components are scheduled for repair, addressing the management of those components, and ensuring that all necessary repair actions are documented. This helps maintain aircraft and equipment at their optimal operational readiness.

The other documents mentioned relate to different aspects of aviation maintenance. The IMRL, or Individual Material Readiness List, provides a detailed inventory of tools and equipment, focusing on the readiness state rather than specific repair needs. PMCS, or Preventive Maintenance Checks and Services, is oriented towards proactive maintenance tasks but does not specifically list components scheduled for repair. Lastly, the NSN, or National Stock Number, is a unique identifier for items within the supply system, but it does not provide detailed information about repair requirements.

In summary, the ICRL directly addresses which components require repair, making it the most appropriate answer to the question.