Airworthiness Directives; Saab Model SAAB SF340A and SAAB 340B Series Airplanes

The FAA is superseding an existing airworthiness directive (AD), which applies to certain Saab Model SAAB SF340A and SAAB 340B series airplanes. That AD currently requires repetitive detailed inspections of the windshield wiper assembly for discrepant conditions, and corrective actions if necessary. This new AD requires repetitive detailed inspections of the left and right wiper arm assemblies for damage, and corrective/related investigative actions if necessary. This AD is prompted by an additional incident of a windshield wiper blade separating from the wiper arm. We are issuing this AD to prevent separation of a wiper arm from the airplane, which could result in damage to the fuselage skin and propeller.