PSEU stands for what in the landing gear system?

PSEU stands for what in the landing gear system?

• A. Proximity Sensing Electronic Unit
• B. Proximity Sensor Electrical Unit
• C. Proximity Sensing Engine Unit
• D. Proximity System Electrical Unit

Answer: (A)

PSEU stands for Proximity Sensing Electronic Unit. In the landing gear system, proximity switches on the gear provide non-contact signals about the gear’s position (up, down, and locked). The PSEU is the electronic processing unit that interprets those signals, determines the actual gear status, and sends the information to the cockpit indicators and other gear logic. This helps ensure the gear can only retract or extend when conditions are correct and triggers fault indications if something isn’t sensing correctly. The other phrasings—using Electrical instead of Electronic, or Sensor instead of Sensing, or introducing Engine/System concepts—don’t match the standard terminology or the gear-position sensing role.

PSEU stands for Proximity Sensing Electronic Unit. In the landing gear system, proximity switches on the gear provide non-contact signals about the gear’s position (up, down, and locked). The PSEU is the electronic processing unit that interprets those signals, determines the actual gear status, and sends the information to the cockpit indicators and other gear logic. This helps ensure the gear can only retract or extend when conditions are correct and triggers fault indications if something isn’t sensing correctly. The other phrasings—using Electrical instead of Electronic, or Sensor instead of Sensing, or introducing Engine/System concepts—don’t match the standard terminology or the gear-position sensing role.