If the A hydraulic system is lost, how can the landing gear be raised?

If the A hydraulic system is lost, how can the landing gear be raised?

• A. The A system raises the gear via a manual lever.
• B. The B hydraulic system retracts the landing gear.
• C. Manual reversion raises it.
• D. The Standby system raises it.

Answer: (B)

Landing gear retraction is powered by two independent hydraulic circuits. If the primary A system fails, the remaining B system still has the capability to operate the gear. In this failure scenario, using the B hydraulic system to power retraction allows you to raise the landing gear even with A lost. The other possibilities aren’t relied upon here because the A path is unavailable, and manual reversion or standby power either isn’t configured to provide the necessary retraction in this condition or isn’t intended as the normal method for raising gear when one system is out.

Landing gear retraction is powered by two independent hydraulic circuits. If the primary A system fails, the remaining B system still has the capability to operate the gear. In this failure scenario, using the B hydraulic system to power retraction allows you to raise the landing gear even with A lost. The other possibilities aren’t relied upon here because the A path is unavailable, and manual reversion or standby power either isn’t configured to provide the necessary retraction in this condition or isn’t intended as the normal method for raising gear when one system is out.