Boeing 777

What is FMU on Boeing 777? (Fuel Metering Unit)

What is WBA on Boeing 777? (Wire Bundle Assembly)

What is VLV on Boeing 777? (Valve)

What is WEU on Boeing 777? (Warning Electronics Unit)

What is DIU on Boeing 777? (Digital Interface Unit)

What is M on Boeing 777? (Mach)

What is SEU on Boeing 777? (Seat Electronics Unit)

What is PA on Boeing 777? (Passenger Address)

What is THSHD on Boeing 777? (Threshold)