Instructional flight has near miss with military helicopter

This is an excerpt from a report made to the Aviation Safety Reporting System. The narrative is written by the pilot, rather than FAA or NTSB officials. To maintain anonymity, many details, such as aircraft model or airport, are often scrubbed from the reports.

Me and my student had a flight planned to work on some maneuvers in our practice area. We started the airplane up, received our taxi clearance, and began to taxi down Taxiway 1 to Runway XX. We still needed to do our run-up, so we turned around into the wind on Taxiway 1 parallel to Taxiway 2. We then noticed a PC-12 taxiing back to Runway XX and ground instructed us to do our run-up on Taxiway 2, so we did.

After we completed the run-up we decided we can depart from Taxiway 2 and requested takeoff clearance from there. Tower then told us to hold short for landing traffic so we did, then tower advised that he had two more airplanes on short final for both runways and that after they landed he would clear us to takeoff, so we waited.

Once those planes had landed we sat for almost another 10 minutes until we noticed another PC-12 taxiing down Taxiway 1 and holding short of runway XX at Taxiway 1. That aircraft then proceeded to request takeoff clearance and was given the takeoff clearance.

I then thought maybe tower had forgotten about us so I reminded them we were still waiting and they responded with “we will get you out shortly,” so we waited some more.

Finally after what seemed like sitting on Taxiway 2 for 30 minutes we were given a takeoff clearance with a “no delay” instruction. We repeated it and pulled out on to runway XX and off we went.

After reaching takeoff speed and rotation, I reminded my student about our climbing airspeed and not a couple seconds after that as I was scanning I saw a military helicopter same altitude on a converging course with us about 300 to 350 feet away and closing.

I then told my student “my controls” and made a climbing right run to try to avoid the helicopter. I then noticed the helicopter flew right underneath us, estimating about 250 feet below us.

I then asked tower for a phone number, and calmed myself down to continue with my flight lesson.

After the flight the controller met me in the FBO to apologize.

Primary Problem: Ambiguous

ACN: 2073825