Also known as: American Association for Laboratory Accreditation.
Why it appears in NDT records
Flaw detectors, thickness gauges and reference blocks from US manufacturers often ship with A2LA-accredited calibration certificates. Under ISO/IEC 17025 traceability rules, those certificates are acceptable evidence in Australia and New Zealand through the ILAC arrangement.
In AMPS
Instrument certificates from any accredited provider are filed on the AMPS equipment page with their due dates flagged.