The landing gear hydraulic safety valve is controlled by:

The landing gear hydraulic safety valve is controlled by the gear lever and the Air Data Inertial Reference Units (ADIRU) 1 and/or 3. This configuration is part of the aircraft's system that ensures safe operation of the landing gear during various flight phases. When the pilot selects the gear lever to either the up or down position, the system relies on data from the ADIRUs to confirm the aircraft's state and positional information.

This arrangement enhances safety by ensuring that the landing gear can only be retracted or extended when appropriate parameters, such as aircraft speed and altitude, are met. The use of multiple ADIRUs provides redundancy to the system, further ensuring that reliable data is available under varying conditions, which is critical for the safe operation of the landing gear mechanism.