Which maintenance record type is an exception to the 1-year retention rule as specified in regulations?

The altimeter test and inspection records are an exception to the 1-year retention rule, as specified in the regulations. This is due to the specific regulations surrounding static pressure systems and altitude reporting systems on aircraft, which require records to be kept longer to ensure ongoing airworthiness and compliance with safety standards.

The Federal Aviation Administration (FAA) mandates that altimeter test and inspection records must be retained until the next test or inspection is completed, resulting in a longer retention period compared to the standard 1-year requirement. This regulation ensures that reliable data is available for reference and verification of the system's accuracy, ultimately contributing to the safety of flight operations.

Other records, such as engine remanufacture records, 100-hour inspections, and aircraft time records typically adhere to a 1-year retention policy as specified by various regulatory guidelines in the maintenance and operation of aircraft. However, the unique safety considerations related to altitude reporting systems necessitate the longer retention requirement for altimeter test and inspection records.