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