# Proposed AD FAA-2024-2322: THOMMEN AIRCRAFT EQUIPMENT AG Digital Air Data Computers

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-07-01
- Products: Airbus Defense and Space
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 30, 2024, 89 FR 79480
- Comments due: November 14, 2024
- Became: [AD 2025-07-01](https://openairdocs.org/ad/2025-07-01)
- Docket: FAA-2024-2322 (https://www.regulations.gov/docket/FAA-2024-2322, where comments are filed)
- Project: MCAI-2024-00065-Q
- FR document: 2024-22251
- Official PDF: https://openairdocs.org/files/sha256/d2/65/d2650a241068cc9fec6484bc7f540fb6626205096fe1ae03fd1c4e4280cf367f (from https://www.govinfo.gov/content/pkg/FR-2024-09-30/pdf/2024-22251.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/09/30/2024-22251/airworthiness-directives-thommen-aircraft-equipment-ag-digital-air-data-computers
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-22251-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2322

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain THOMMEN AIRCRAFT EQUIPMENT AG (THOMMEN) AC32 Digital Air Data Computers. This proposed AD results from occurrences of AC32 Digital Air Data Computers (ADCs) that stop functioning below certain temperatures. This proposed AD would require replacing an affected AC32 Digital ADC with a serviceable part. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 30, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-22251, comments due Nov 14, 2024 (https://www.federalregister.gov/documents/2024/09/30/2024-22251/airworthiness-directives-thommen-aircraft-equipment-ag-digital-air-data-computers)

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