Boeing

What is AC on Boeing 737? (Alternating Current)

What is ASCTS on Boeing 737? (Air Supply Control And Test System)

What is PTU on Boeing 737? (Power Transfer Unit)

What is G/S on Boeing 737? (Glide Slope)

What is RFLNG on Boeing 737? (Refueling)

What is EXT on Boeing 737? (Extend)

What is IND LTS on Boeing 737? (Indicator Lights)

What is EDIU on Boeing 737? (Engine Data Interface Unit)

What is ESS on Boeing 737? (Essential)