PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 60; Flight Crew Total 4300; Flight Crew Type 1000
Situational Awareness
Deviation / Discrepancy - Procedural FAR
Air Traffic Control Issued New Clearance; Flight Crew Executed Go Around / Missed Approach
Human Factors; Procedure
I was working as a flight instructor supervising from the ground; a student solo flight. This was the student's second solo flight. I had a 2 way hand held radio to monitor the student's communications.As the student was on downwind for right traffic; Runway XXR the controller was trying to work an inbound jet into the traffic pattern and told the student to continue for Runway XXL. The controller didn't say they were changing his assigned runway. Even I thought the controller miss spoke and had meant to say Runway XXR. The student tried to verify which runway; but didn't get a response. Ultimately; he was cleared to land on Runway XXL. At this point; I'm worried about my student's safety because Runway XXL is a short; narrow runway he hasn't gained proficiency on yet. The student was proficient for XXR; which is about 5;900 feet long.My student should have said 'unable XXL; student pilot'; but he didn't say it. I also would have expected him to do his own go-around; but as he approached about 300 feet AGL; it was apparent he was not going around. I briefly thought of using my cell phone to call the Tower; wait for an answer and request that they tell the student to go-around. But things were happening quickly as the student continued approach to XXL. Fearing for my student's safety; I transmitted to Tower on the handheld the following.''Tower; NZZZZZ Instructor; I'm sorry; but I need [student pilot] to go-around.' The Tower then told the student to go-around. The student later landed safely on XXR.I later spoke to the Tower Chief. He said he understood my position and that I thought it was an emergency situation; but technically I violated regulations/law by transmitting on Tower frequency; but he was not going to pursue it.The Tower Chief and my owner of the flight school will have a future meeting to develop procedures for better communications and understanding of how to handle solo student pilots.
PA28 instructor; supervising a student solo from the ramp; reported calling the Tower on a handheld VHF to have his student go-around after the student is cleared to land on the shorter runway.