Boeing

What is GCU on Boeing 737? (Generator Control Unit)

What is L on Boeing 737? (Left)

What is LO on Boeing 737? (Lock Out)

What is CP on Boeing 737? (Control Panel)

What is A/T on Boeing 737? (Autothrottle)

What is EDP on Boeing 737? (Engine Driven Pump)

What is STAB on Boeing 737? (Stabilizer)

What is BTL DISCH on Boeing 737? (Bottle Discharge (Fire Extinguishers))

What is HMU on Boeing 737? (Hydromechanical Unit)