An air data test set used to measure both pitot and static air flow. The instrument calculates air flow measurements by determining an aircraft’s airspeed and altitude. These measurements are vital for safe air travels; therefore, it is important to ensure that an air data test set is functioning at its full capacity. To test an air data test set’s accuracy, calibration of the test set should be performed.
During calibration, an aviation technician will check an air data test set’s readings for accuracy and will also check the uncertainty ratio at specific altitude levels. Uncertainty level usually increase as an aircraft climbs into higher altitude; therefore calculation of the ratio is crucial for pilots to ensure they are within the right uncertainty during flight.
Once an air data test set is calibrated, many benefits can be reaped including:
An air data test set that is calibrated guarantees accurate air flow measurement readings. Without calibration, an air data test set has a high chance of displaying incorrect measurements, which in turn could lead to safety issue during flight.
Calibration performed on an air data test set establishes instrument reliability, which in turn calculated air flow measurements that can be trusted.
By performing air data test set calibration, adherence to industry standards and government regulations are maintained.
An air data test set should have a set calibration interval to avoid instrument inaccuracy and drifting. Manufacturer recommendations on an air data test set’s calibration interval can be found in the instrument’s user manual. Usually an air data test set will only require calibration annually; however, if the instrument acquires any damage or has undergone any substantial repair, an air data test set will need to be recalibrated sooner.
Learn more about calibration of air data test sets.
Read the guide here.