• Enforcing end-of-travel limits on leading-edge slats and trailing-edge flaps.
  
  

• Limiting spoiler and speed-brake actuator stroke to design-approved positions.
  
  

• Providing position feedback to the Flight Control Data Concentrator and ECAM for real-time monitoring.
  
  

• Protecting wing-mounted control surfaces from mechanical overextension during high-speed retraction or extension.

• How does the TLU communicate travel limits to the cockpit?

Dual redundant limit switches send discrete position signals via ARINC-standard connectors to the flight control computer and ECAM displays.

• What maintenance is required for a Travel Limitation Unit?

Periodic functional checks include end-of-travel actuation tests, electrical continuity verification of limit switches, and hydraulic leak inspections during scheduled C-checks.

• What happens if the TLU fails in flight?

If one channel fails, the redundant circuit maintains travel-limit protection. A dual failure triggers a cockpit alert, and protective stops still mechanically restrict travel.