AD 2009-05-08
Unsafe Condition
Annunciation errors in the Trimble or FreeFlight Systems 2101 I/O Approach Plus GPS navigation system could lead to erroneous information displays, potentially causing a pilot to make an unsafe decision and resulting in loss of control of the aircraft.
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Required Actions
Upgrade the system software of the Trimble or FreeFlight Systems 2101 I/O Approach Plus GPS navigation system, part number 81440-xx-241E, 81440-xx-241F, or 81440-xx-241G (xx indicates 02, 03, or 12), from software revision -241E, -241F, or -241G to system software revision P/N 81440-xx-241J.
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Compliance Time
Within 180 days after the effective date of this AD for aircraft approved for IFR flight, or 270 days after the effective date of this AD for aircraft approved for VFR flight.
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Affected Aircraft
Trimble or FreeFlight Systems 2101 I/O Approach Plus GPS navigation systems, part number 81440-xx-241E, 81440-xx-241F, or 81440-xx-241G (xx indicates 02, 03, or 12), with software revision -241E, -241F, or -241G installed, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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