🔍 Key Concepts

• Maintenance and inspection intervals for MODU (Mobile Offshore Drilling Unit) cranes • Difference between routine (short-interval) checks and full periodic inspections after long idle periods • How a long lay-up or idle period affects the level of inspection detail required

💭 Think About

• If a crane has been idle for more than six months, does it make more sense to treat it like a brief routine check, or like a more thorough periodic inspection? Why? • Which type of inspection from the choices would most likely involve a comprehensive review of structural components, wire ropes, safety devices, and load‑testing? • Think about risk: after six months idle, would the concern be small adjustments and housekeeping, or re‑establishing full confidence in the crane’s safe working condition?

✅ Before You Answer

• Identify which option (weekly, monthly, quarterly, yearly) normally represents the most comprehensive inspection level. • Recall that after long periods out of service, equipment is usually treated almost like it is being returned to full service for the first time in a while. • Verify which inspection interval is usually associated with detailed structural checks and possibly load tests, rather than just visual or operational checks.