What is the probable cause for a flashing master warning after gear retraction?

What is the probable cause for a flashing master warning after gear retraction?

• A. Failure of one or both landing gear ground safety switches
• B. Hydraulic pump failure
• C. Thrust reverser mis-deployed
• D. Nose gear unlocked

Answer: (A)

The flashing master warning after gear retraction is most likely caused by a fault in the landing gear position sensing. The Beechjet uses ground safety switches to confirm when the gear is fully retracted and the doors are in the safe position. If one or both of these switches fail, the warning system can’t confirm that the gear is stowed, so it triggers a master warning to alert the crew. This direct link between gear position sensing and the warning makes it the most probable cause. Hydraulic pump failure would affect hydraulic systems, not specifically the gear-retraction indication. A thrust reverser mis-deploy is related to thrust control, not a post-retraction gear position warning. A nose gear not locked could cause a warning, but the gear position switches are the primary sensing path for the master warning following retraction, making their failure the most likely driver of this condition.

The flashing master warning after gear retraction is most likely caused by a fault in the landing gear position sensing. The Beechjet uses ground safety switches to confirm when the gear is fully retracted and the doors are in the safe position. If one or both of these switches fail, the warning system can’t confirm that the gear is stowed, so it triggers a master warning to alert the crew. This direct link between gear position sensing and the warning makes it the most probable cause.

Hydraulic pump failure would affect hydraulic systems, not specifically the gear-retraction indication. A thrust reverser mis-deploy is related to thrust control, not a post-retraction gear position warning. A nose gear not locked could cause a warning, but the gear position switches are the primary sensing path for the master warning following retraction, making their failure the most likely driver of this condition.