Definition
The greatest total weight at which an aircraft is approved to be operated, including the empty aircraft, fuel, oil, crew, passengers, baggage, and cargo. This limit is established by the manufacturer and published in the aircraft's approved flight manual. Operating above this weight is prohibited and may compromise structural integrity, climb performance, controllability, and required safety margins.
Plain English
The heaviest the whole aircraft is allowed to be when flying — counting everything on board. Go over this number and you are outside the aircraft's approved limits.
Context Anchor
Seen in aircraft limitations, weight-and-balance planning, performance planning, and operating documents.
Derivation
Gross' here comes from the older commercial sense meaning 'total, before anything is subtracted' — the same sense used in 'gross weight' on a shipping label. So 'maximum gross operating weight' simply means 'the largest total weight allowed during operations.'
Why Pilots Care
Operating above MGOW reduces climb performance, increases stall speed, and may cause structural damage or control issues, violating certification standards.
Intuition Check
Gross does not mean unpleasant here; it means total aircraft weight. Maximum is a limit, not a target.
Example Sentence 1
After loading the bags and topping off the tanks, the pilot recalculated and confirmed the aircraft was 80 pounds under its MGOW.
Example Sentence 2
High density altitude forced the operator to offload baggage so the flight would stay under the published MGOW.