A handheld air gauge used for air brake tests must have been checked for accuracy within how many days?

A handheld air gauge used for air brake tests must have been checked for accuracy within 92 days because this period ensures that the equipment provides reliable and precise measurements, which are crucial for the safety and performance of air brake systems. Regular checks within this timeframe help to maintain compliance with safety regulations and standards, contributing to the overall safety of train operations. Using an air gauge that exceeds the accuracy check timeframe could lead to potential failures in brake systems, which can have serious safety implications.

The specified time limit of 92 days strikes a balance between operational efficiency and the necessity for accuracy, allowing enough time for routine checks while ensuring that the equipment remains within acceptable accuracy limits. This is a key practice in train handling to enhance safety and minimize the risk of accidents.