Summary of FAA Airworthiness Directive 2014–22–09 (Boeing 767 Series)
The Federal Aviation Administration (FAA) issued Airworthiness Directive (AD) 2014–22–09, effective December 17, 2014, applicable to all Boeing 767–200, –300, –300F, and –400ER series aircraft. The directive was prompted by a report of a trailing edge (TE) flap rotary actuator slipping from its reaction ring—posing a risk of flap gear disengagement. If left unaddressed, this condition could lead to uncommanded roll, flap blowback or even flap departure, severely compromising aircraft control and safety during flight and landing.
The AD mandates repetitive detailed inspections of the fixed ring gear and reaction ring splines of the flap rotary actuator assemblies for signs of corrosion or disengagement at all support positions. These inspections, along with any required investigative and corrective actions, must follow the procedures in Boeing Alert Service Bulletin 767–27A0229, dated March 4, 2014. Actions identified as “Required for Compliance” (RC) in the service bulletin must be completed; other steps may be adjusted with appropriate engineering judgment.
For aircraft incorporating STC ST01920SE, no special compliance modification is required. The AD also outlines procedures for applying for Alternative Methods of Compliance (AMOCs), which must be approved by the FAA’s Seattle Aircraft Certification Office or Boeing’s Organization Designation Authorization (ODA), provided safety is maintained.
The directive includes official contacts for further information and directions on accessing required service bulletins through Boeing or public archives. The ultimate goal of this AD is to ensure continued airworthiness by preventing potentially catastrophic flap control failures on Boeing 767 aircraft.
