Action
Notice of proposed rulemaking (NPRM).
Summary
We propose to adopt a new airworthiness directive (AD) for The Boeing Company Model 777 airplanes. This proposed AD was prompted by reports of uncommanded altitude display changes in the mode control panel (MCP) altitude window. This proposed AD would require replacing the existing MCP with a new MCP having a different part number. We are proposing this AD to address the unsafe condition on these products.