Final answer:
The exact retention period for pilot training records is determined by aviation authorities such as the FAA, which requires records to be kept for several years to ensure safety and compliance.
Step-by-step explanation:
The retention period for pilot training records is guided by the regulations set forth by aviation authorities such as the Federal Aviation Administration (FAA). While the provided excerpts do not specify the exact duration for which an air operator must hold on to pilot training records, generally, aviation regulations require the retention of such records for a significant period, often several years, after a pilot leaves the company or for a set number of years following the record entry date. This ensures the availability of a pilot's training history for review in the case of investigations or audits.
It's crucial for air operators to comply with these regulations to maintain safety standards and to ensure that proper documentation is available when needed. For specific retention periods, an air operator should refer to the current FAA guidelines or applicable aviation authority directives.