Summary
We are revising an earlier proposed airworthiness directive (AD) for certain Boeing Model 767 airplanes. The original NPRM would have required modifying the link arms of the number 2 windows in the flight compartment. The original NPRM resulted from reports of the number 2 windows opening during takeoff roll, which has resulted in aborted takeoffs. This supplemental NPRM would require an inspection of the number 2 windows to determine whether the link arms are in the over-center position. The results of the inspection would determine the need for the modification. This supplemental NPRM would also require the inspection and applicable corrective action following any rigging change or replacement of any number 2 window assembly. We are proposing this supplemental NPRM to prevent the opening of the number 2 windows during takeoff roll, which could result in an aborted takeoff or an unscheduled landing, and adversely affect the flightcrew's ability to perform critical takeoff communication.