Chilly Computers Grounded: FAA Orders Swap for Freeze-Proof Devices
Published Date: 4/10/2025
Rule
Summary
If you fly planes with THOMMEN AC32 Digital Air Data Computers, listen up! The FAA found some of these devices can stop working in cold weather, which is a big no-no for safe flying. So, they’re requiring owners to swap out the faulty parts ASAP to keep everyone safe and sound.
Analyzed Economic Effects
2 provisions identified: 1 benefits, 1 costs, 0 mixed.
Mandatory Replacement of Faulty ADCs
If you own or operate an airplane equipped with a THOMMEN AC32 Digital Air Data Computer (ADC), the FAA requires you to replace any affected AC32 ADC with a serviceable part. This rule follows findings that some AC32 ADCs can stop functioning below certain temperatures.
Improves Cold-Weather Flight Safety
The FAA issued this airworthiness directive because some THOMMEN AC32 Digital ADCs can stop working in cold weather. Replacing affected units aims to address that unsafe condition and reduce the risk of ADC failures below certain temperatures.
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