1. Get in CH-67 Huron as pilot.
2. Start engine.
3. Fly next to an object, so as to fully damage the main rotors.
4. Damage main rotors fully. They will mostly disappear (showing full damage state).
5. type '(vehicle player) setDamage 0;' into console.
Vehicle will be fully repaired and fly-able, but rotors will still appear in full damaged state.