Definition
An accident category in which the pilot is unable to maintain or regain control of the aircraft within its intended flight parameters, resulting in an unintended departure from controlled flight. It includes events such as stalls, spins, and unrecoverable upsets, and is categorized as occurring either in flight (LOC-I) or on the ground (LOC-G).
Plain English
The aircraft ends up doing something the pilot did not intend, and the pilot cannot get it back to flying or moving the way it should. It is the official label used when an accident happens because the airplane stopped responding to control inputs the way the pilot needed it to.
Context Anchor
Seen in accident reports, safety discussions, and instructor training when describing how an accident developed.
Derivation
From the everyday meaning of 'control' (to direct or manage). In aviation, 'control' has a specific meaning: keeping the aircraft within its intended flight path, attitude, and speed. 'Loss of control' is the formal accident-investigation term for when that ability is lost.
Why Pilots Care
Loss of control remains the leading cause of fatal general aviation accidents.
Grounding Statement
The key idea is that the aircraft has stopped being safely managed, whether because of pilot action, lack of correction, conditions, or a combination of factors.
Intuition Check
Loss of control does not only mean the controls broke or stopped working. In accident reports, it usually means the aircraft was not kept under safe control, even if the controls themselves were functioning.
Example Sentence 1
The NTSB classified the accident as a loss of control in flight after the pilot stalled the aircraft while turning from base to final.
Example Sentence 2
The instructor demonstrated techniques to prevent loss of control in a stall.