AD Amdt-39-10924
Unsafe Condition
Internal component failure in BFGoodrich SKYWATCH SKY497 installations with a top-mounted antenna can change the antenna configuration from TOP to BOTTOM mount, leading to incorrect target indicator display on the aircraft's display system.
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Required Actions
Revise the airplane flight manual (AFM) to include instructions for verifying the correct antenna configuration each time the aircraft is powered up. Remove from service any SKY497 installations with an incorrect antenna configuration.
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Compliance Time
Before further flight
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Affected Aircraft
All BFGoodrich Avionics Systems, Inc. SKYWATCH SKY497 installations with a top-mounted antenna 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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