Date: 202010
Local time of day: 1201-1800
Location: F70.Airport, CA
Flight conditions: VMC
Weather elements / visibility: 10
Light: Daylight
Aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Operator: FBO
Operating under: Part 91
Flight plan: VFR
Mission: Training
Flight phase: Takeoff / Launch
Airspace: Class G F70
ATC / advisory: CTAF F70
Second aircraft: Small Aircraft
Reporter organization: FBO
Reporter function: Pilot Flying; Instructor
Reporter qualification: Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Commercial
Human factors: Communication Breakdown
Anomaly: Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Took Evasive Action
Contributing factors: Procedure; Human Factors
Primary problem: Procedure

Narrative: I was about to begin the flight portion of a lesson with my student. We were holding short of runway; allowing multiple planes to safely land before we had a good opportunity to depart. While holding short; another plane had landed and was about to pull off of the runway onto A3; but there was an Aircraft Y on the other side of the hold short line. A radio call was made asking what the Aircraft Y was doing; and then he taxied out of A3 and Aircraft Z was able to taxi back to midfield parking. After Aircraft Z was clear of the runway; another aircraft landed on Runway 18; did a touch and go; and took off for a south departure. After waiting for about 5 aircraft to land on 18; the traffic pattern was now not busy; there was one aircraft on the downwind. I was positioned to where I could see the upwind; left downwind; left base and final of the traffic pattern; as well as the entire runway and taxiway and determined it safe to now make my radio call announcing my departure. After the radio call was made; it was not blocked; again I visually inspected that the runway was clear and slowly rolled onto 18. It was my student's second flight lesson; and his mother accompanied us in the backseat. While talking him through how to taxi onto the runway; how to takeoff and where to be visually scanning; I performed a normal takeoff; lifting off at rotation speed; the runway was still clear. After about five to ten seconds after rotation; I looked down to see my ground track over the runway and saw Aircraft Y directly beneath me. While maintaining positive control of the aircraft; talking through what I was doing with my student I flew at the speed that safely allowed us to gain as altitude. I made a radio call asking what the pilot in the Aircraft Y was doing and if he had not heard or seen us take off and if he had us in sight at that moment. He did not respond. Then I said 'What the hell dude?' on the radio. Due to how fast everything happened; and trying to remain calm and fly the airplane safely; it was hard to determine exactly how close the aircraft actually was to me. At this point I determined the safest action was to get us as far away from this plane as I could. I continued on the upwind; to where I could not see the Aircraft Y anymore. I was hoping that he had aborted his takeoff. Continuing out and scanning; maintaining a calm demeanor for myself as well as my passengers; I then heard an early crosswind call and knew it was the pilot in the Aircraft Y. Another instructor from FBO said '[name]; what is going on with you today?' A few other aircraft responded 'Agreed;' 'Agreed.' After this I did not want to return to the pattern knowing the Aircraft Y was still flying. I decided to take my student to the practice area to where I could continue my lesson and also monitor the traffic pattern to know when it would be safe to return; as I always do. After about 30 minutes I determined it was safe to return to the airport and land; because I didn't hear or see anyone in the traffic pattern. We landed safely. My passengers did not even notice what was happening until we were almost clear of the traffic pattern; I had told them someone was trying to takeoff underneath us. Still; they do not know the severity of how close it was because of being distracted by it being one of their first flights and not paying attention to the radio calls or doing the constant visual scan. I am extremely fortunate that my passengers and I are alive. This pilot; name; is the definition of unsafe. He chooses to make extremely unsafe actions. I will never fly if I see this man at the airport and will tell every student I have and pilot I see to also not fly if this man is out. If he is not held accountable for his actions; I fear that someone could be tragically hurt. My coworker; another CFI was a witness standing at midfield parking near A3 taxiway; and said it was a miss of 5 feet.




Synopsis: Flight Instructor reported unsafe operations of a pilot resulted in NMAC and evasive action near F07 airport.