FAA · Airworthiness Directive
Airworthiness Directives; Thommen Aircraft Equipment AG Digital Air Data Computers
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain THOMMEN AIRCRAFT EQUIPMENT AG (THOMMEN) AC32 Digital Air Data Computers. This AD results from occurrences of AC32 Digital Air Data Computers (ADCs) that stop functioning below certain temperatures. This AD requires replacing an affected AC32 Digital ADC with a serviceable part. The FAA is issuing this AD to address the unsafe condition on these products.
Applicability
Aircraft makes and models this AD applies to, sorted by US-registered fleet size.
Federal Register text
Verbatim from the Federal Register publication — required actions, compliance times, parts/serial numbers, and methods of compliance. The Federal Register is the legally binding document; this rendering is for readability. Cite: 90 FR 15304.
[Federal Register Volume 90, Number 68 (Thursday, April 10, 2025)] [Rules and Regulations] [Pages 15304-15306] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2025-06066]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2322; Project Identifier MCAI-2024-00065-Q; Amendment 39-23002; AD 2025-07-01] RIN 2120-AA64
Airworthiness Directives; Thommen Aircraft Equipment AG Digital Air Data Computers
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain THOMMEN AIRCRAFT EQUIPMENT AG (THOMMEN) AC32 Digital Air Data Computers. This AD results from occurrences of AC32 Digital Air Data Computers (ADCs) that stop functioning below certain temperatures. This AD requires replacing an affected AC32 Digital ADC with a serviceable part. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective May 15, 2025. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of May 15, 2025.