AD NUMBER: 2019-16-05

PRODUCT: All The Boeing Company Model 777 airplanes

ACTION: Final Rule.

SUMMARY: This AD was prompted by reports of uncommanded fore/aft movements of the Captain's and First Officer's seats.

This AD requires an identification of the part number, and if applicable the serial number, of the Captain's and First Officer's seats, and applicable on-condition actions for affected seats.

DATES: This AD is effective October 8, 2019.

COST: The FAA estimates that this AD affects 190 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

Required Actions per seat

• Identification: 1 work-hour × $85 per hour = $85.
• Detailed inspection, horizontal movement system: 1 work-hour × $85 per hour = $85.
• Checks, horizontal movement system: 2 work-hours × $85 per hour = $170 per check cycle.

On Condition Actions per seat

• Adjustment, control lever cable: 1 work-hour × $85 per hour = $85.
• Overhaul, horizontal movement system: Labor: 11 work-hours × $85 per hour = $935. Parts: Up to $5,824. Cost per seat: Up to $6,759.
• Inspection of each seat's fore/aft and vertical manual control levers: 1 work-hour × $85 per hour = $85.
• Installation of serviceable seats: 1 work-hour × $85 per hour = $85.
• Clearing FOD: 1 work-hour × $85 per hour = $85.
• Replacement of the horizontal actuator: Labor: 1 work-hour × $85 per hour = $85, per actuator. Parts: $7,937 per actuator. Total cost: $8,022 per actuator.
• Functional test, adjusted control lever cable: 1 work-hour × $85 per hour = $85.

FMI: AD