TWR CTLR IS UNAWARE THAT THE GEAR PROB IS A SIMULATION AND TAKES STEPS BEYOND WHAT THE INSTRUCTOR PLT WOULD HAVE DESIRED.

Narrative

I WAS GIVING DUAL INSTRUCTION TO A COMMERCIAL APPLICANT IN AN SMA. I SIMULATED A LNDG GEAR MALFUNCTION BY TURNING ON THE CTL PANEL LIGHT SWITCH. THIS CAUSES THE LNDG GEAR POS LIGHTS TO DIM SO THAT DURING DAYLIGHT CONDITIONS THEY APPEAR TO NOT ILLUMINATE AT ALL. THE STUDENT WAS UNAWARE OF MY ACTIONS. I DID THIS TO OBSERVE THE STUDENT REACTIONS TO THE SIT AND DEMONSTRATE THE PROPER PROCS FOR RECTIFYING THE PROB. THE STUDENT DID A GOOD JOB OF TRYING TO SOLVE THE PROB BY USING THE EMER CHKLIST; BUT FAILED TO TURN THE PANEL LIGHT SWITCH OFF. WE THEN PROCEEDED TO HOME ARPT (BJC) WITH STUDENT STILL BELIEVING WE HAD A GEAR PROB. HE CONTACTED THE BJC CTL TWR AND REQUESTED A LOW FLY-BY SO THAT THEY COULD SEE IF THE GEAR WAS DOWN. THE TWR CONFIRMED THAT THE GEAR APPEARED DOWN SO WE DID A GAR. AT THAT POINT I TURNED THE PANEL LIGHT SWITCH BACK OFF AND WHEN THE STUDENT EXTENDED THE GEAR FOR LNDG; WE GOT 3 GREEN LIGHTS INDICATING GEAR WAS DOWN AND LOCKED. WE INDICATED TO THE TWR THAT WE HAD POSITIVE INDICATION GEAR DOWN AND THEY CLRED US TO LAND. UNAWARE TO ME AT THE TIME; THE TWR HAD SENT ARPT VEHICLES OUT TO THE RWY TO HELP IN CASE WE HAD A PROB WITH OUR LNDG. I FEEL IT IS UNFORTUNATE THAT I ALLOWED THIS SIMULATED EMER SIT PROGRESS TO A POINT THAT INCLUDED ATC AND GND OPS AT A CTLED ARPT. THEY HAVE BETTER THINGS TO DO; I AM SURE. IN THE FUTURE; I WILL NOT ALLOW SIMULATIONS TO PROGRESS SO FAR.