AD 2001-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Raytheon | Aircraft Company Beech Model 1900D | Airworthiness Directives; Raytheon Aircraft Company Beech Model 1900D Airplanes |
Unsafe Condition
Inconsistent NAV 'FLAG' displays on the KLN-90B Global Positioning System (GPS) could cause the copilot to make decisions based on an invalid GPS source without knowing it was invalid.
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Required Actions
Rewire the KLN-90B GPS to eliminate the possibility of inconsistent NAV 'FLAG' displays, in accordance with Raytheon Mandatory Service Bulletin SB 34-3222.
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Compliance Time
Within the next 400 hours time-in-service (TIS) after April 9, 2001, unless already accomplished.
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Affected Aircraft
Raytheon Aircraft Company Beech Model 1900D airplanes, serial numbers UE-156 through UE-299, equipped with a KLN-90B GPS incorporated in accordance with AlliedSignal Supplemental Type Certificate (STC) SA00245WI-D.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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