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Airworthiness Directives; Transport and Commuter Category Airplanes

Detected July 16, 2026 · in Aviation Maintenance & Airworthiness (FAA)

New FAA airworthiness directive (AD) for all transport and commuter category airplanes with radar altimeters. Requires inspection and possible modification to prevent altimeter interference from 5G C-band signals.

Aforeworn detected this change in the Aviation Maintenance & Airworthiness (FAA) space on July 16, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Critical. Part 145 repair stations, Part 135/121 operators, corporate flight departments, flight schools operating affected aircraft should confirm how it applies to their specific situation before acting. There is a time constraint attached: Compliance required within 30 days of AD effective date (typically 30 days after publication).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Aviation Maintenance & Airworthiness (FAA) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.

What changed

FAA adopted a new AD mandating actions for radar altimeters on transport and commuter category airplanes due to 5G interference risks.

Who it affects

Part 145 repair stations, Part 135/121 operators, corporate flight departments, flight schools operating affected aircraft

What you must do

Comply with AD by inspecting radar altimeters and installing filters or modifications as specified in the AD.

Deadline

Compliance required within 30 days of AD effective date (typically 30 days after publication).

Source: https://www.federalregister.gov/documents/2026/06/30/2026-13162/airworthiness-directives-transport-and-commuter-category-airplanes

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