AD Amdt-39-17990
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. Air Data Pressure Transducers |
Unsafe Condition
Inaccuracies of the pressure sensors could result in altitude, computed airspeed, true airspeed, and Mach computation errors, reducing the ability of the flightcrew to maintain the safe flight of the aircraft and potentially leading to loss of control.
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Required Actions
The AD required doing various tests or checks of equipment having certain air data pressure transducers, removing equipment if necessary, and reporting the results. An option to remove affected equipment was also allowed.
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Compliance Time
Before further flight
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Affected Aircraft
Honeywell International Inc. air data pressure transducers installed in air data computers (ADC), air data modules (ADM), air data attitude heading reference systems (ADAHRS), and digital air data computers (DADC) with specific part numbers and serial numbers, as identified in Honeywell Alert Service Bulletin ADM/ADC/ADAHRS-34-A01, dated November 6, 2012. These transducers are installed on various aircraft models including Airbus A318, A319, A320, A321, A330, A340, AGUSTA AW139, Bell 429, Boeing 767, 777, Cessna 560XL, Dassault Mystère-Falcon 900 and Falcon 2000, Embraer EMB-135BJ, Gulfstream GIV-X and GV-SP, Learjet 45, Pilatus PC-12/47E, and Viking Air DHC-6-400.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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