What technical order provides instructions on how to modify military systems or equipment?

The Time Compliance Technical Order (TCTO) is specifically designed to provide detailed instructions for modifying military systems or equipment in a timely manner, ensuring that necessary updates or changes are executed efficiently and effectively. TCTOs outline the procedures needed to implement modifications that may be required due to safety, performance, or reliability issues. They often include information on the steps to be taken, tools required, and any specific applicability or urgency associated with the modification.

In contrast, other technical orders serve different purposes. Work Unit Code manuals provide guidelines for the maintenance and repair tasks associated with specific work units but do not focus solely on modifications. Standard Installation Practices Technical Orders (SIPTO) focus on the correct installation methods and procedures for various systems, while Depot Maintenance Modification Technical Orders (DMMTO) are geared towards more comprehensive modifications typically handled at depots rather than immediate changes necessitated by urgent operational needs. Thus, TCTOs are the appropriate resource for directing timely modifications of military systems and equipment.