Which facility type performs Unlimited Maintenance according to the definitions?

• A. Repair stations authorized for hot-section replacement
• B. Overhaul facilities
• C. Local line maintenance crews
• D. Aircraft manufacturers only

Answer: (B)

Unlimited maintenance encompasses a full teardown, inspection, repair or replacement of all engine components, reassembly, and testing to bring the engine back to a serviceable condition. This broad scope requires a facility equipped for complete overhaul, with specialized tooling, formal procedures, and rigorous quality control to ensure every part meets standards. Overhaul facilities are designed for this comprehensive process, which is why they are the best fit. The other options handle more limited tasks: hot-section repair stations are restricted to hot-section work, local line maintenance crews perform routine in-field maintenance and minor repairs, and aircraft manufacturers focus on production and limited factory repairs rather than full in-service engine overhauls.