AD 2017-22-14
Unsafe Condition
Coasting (extrapolated stale data) of automatic dependent surveillance-broadcast data (ADS-B position/velocity data) on TSS-4100 units, which can result in misleading position and/or altitude data being reported by the airplane.
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Required Actions
Install the TSSA-4100 Field Loadable Software (FLS) upgrades on the TSS-4100 units.
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Compliance Time
Within 12 months or 750 hours time-in-service (TIS), whichever occurs first.
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Affected Aircraft
Rockwell Collins, Inc. TSS-4100 Traffic Surveillance System Processing Units that incorporate TSSA-4100 Field Loadable Software (FLS) part numbers 810-0052-002/-003/-010/-011/-012/-100/-101, installed on airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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