AD Amdt-39-11064
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; AlliedSignal Avionics, Inc. Models GNS- Xls and GNS-Xl Flight Management Systems |
Unsafe Condition
Inaccurate information from the AlliedSignal Models GNS-Xls and GNS-Xl GPS flight management systems may cause deviation from an intended flight path during a non-precision approach to an airport.
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Required Actions
Insert a limitation into the Operations Limitation Section of the Airplane Flight Manual (AFM) or Flight Manual Supplement prohibiting the use of these GPS units on previously published non-precision approaches. Alternatively, accomplish hardware and software modifications as specified in the AlliedSignal service bulletins.
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Compliance Time
Before further flight
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Affected Aircraft
AlliedSignal Avionics, Inc. Models GNS-Xls and GNS-Xl global positioning systems (GPS) flight management systems installed on aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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