EASA 2013-0104R3

Supersedes but retains requirements of AD 2013-0104, which mandated repetitive inspections and cleaning of the flap actuators. Daher has developed an improved design of the actuator drive nut, which under the updated AD is a terminating action if installed. Prompted by excessive wear of the inner flap actuator drive nut due to grease pollution. If not detected and corrected, this condition may lead to improper play between the actuator threaded rod and the drive nut, which could result in loss of flap control.