Boeinger

What is HDG REF on Boeing 737? (Heading Reference)

What is T OR TK OR TRK on Boeing 737? (Track)

What is FOD on Boeing 737? (Foreign Object Damage)

What is DPCT on Boeing 737? (Differential Protective Current Transformer)

What is RNAV on Boeing 737? (Area Navigation)

What is ELCU on Boeing 737? (Electrical Load Control Unit)

What is IDS on Boeing 737? (Integrated Display System)

What is GSB on Boeing 737? (Ground Service Bus)

What is CAS on Boeing 737? (Computed Airspeed)

What is SAARU on Boeing 737? (Standby (Secondary) Attitude Air Data Reference Unit)