AD NUMBER: 2020-04-19

PRODUCT: Certain Boeing Model 777 airplanes.

ACTION: Final rule

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2017-15-01, which applied to certain Boeing Model 777 airplanes.

AD 2017-15-01 required replacing the existing mode control panel (MCP) with a new MCP having a different part number.

This AD retains the requirements of AD 2017-15-01, expands the applicability to include certain other airplanes, and adds a new requirement for certain airplanes to identify and replace the affected parts.

This AD was prompted by a determination that the affected parts may be installed on airplanes outside of the original applicability of AD 2017-15-01.

DATES: This AD is effective April 21, 2020.

COST: The FAA estimates that this AD affects 231 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

Replacement (retained actions from AD 2017-15-01)

• Labor: 2 work-hours × $85 per hour = $170.
• Parts: Up to $5,800.
• Cost per Airplane: Up to $5,970.

New proposed action (up to 28 airplanes)

• 1 work-hour × $85 per hour = $85 per airplane.

FMI: AD