Why is hydraulic redundancy critical for landing gear operations?

• A. It ensures gear can extend/retract even if one hydraulic circuit fails
• B. It increases weight
• C. It shortens gear travel distance
• D. It ensures electrical power supply for pumps

Answer: (A)

Hydraulic redundancy is about keeping the landing gear moving even if part of the hydraulic system fails. The gear must extend and retract reliably during critical phases of flight, so having two independent hydraulic paths (and often separate pumps and reservoirs) means a fault in one path won’t prevent gear operation. If one circuit leaks, loses pressure, or a line fails, the other circuit can still provide the necessary force to deploy or retract the gear, maintaining control and safety. This is far more crucial than simply adding weight, changing travel distance, or focusing on electrical power for pumps—the key safety benefit is continued gear operation in the presence of a fault.