Final answer:
To restore lost altitude and airspeed information, rely on the Pitot-static system and troubleshoot or repair faulty components. Modern aircraft may also use GPS systems as a backup.
Step-by-step explanation:
To restore the lost altitude and airspeed information, you would need to rely on the instruments in an aircraft called the Pitot-static system. This system uses a combination of the pitot tube and static ports to measure air pressure differences, which are then converted into altitude and airspeed readings.
If the altitude and airspeed information is lost due to a malfunction in the Pitot-static system, it may be necessary to troubleshoot and repair the system or replace faulty components to restore accurate measurements.
Additionally, modern aircraft may also have GPS systems that can provide altitude and groundspeed information as a backup or in combination with the Pitot-static system.