AD 2019-21-06
Unsafe Condition
Occurrences have been reported of pilot/co-pilot unexpected rearward movement during take-off and landing. Investigations determined that horizontal guide block wear, presence of burrs on horizontal centre track and horizontal track lock system weakness (spring tension too low) were causes which contributed to the seat not being correctly locked.
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Required Actions
Modification and re-identification of the affected seats, initial and repetitive inspections of the affected tracklock springs, and, depending on the findings, replacement of the tracklock springs with a part eligible for installation.
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Compliance Time
Before further flight
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Affected Aircraft
Ipeco pilot and co-pilot seats installed on, but not limited to, ATR-GIE Avions de Transport Regional (ATR) 42 and ATR 72 airplanes of U.S. registry.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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