Narrative:

After more than an hour of multi-training, the student and I finished up the flight with 2 lndgs. The first we made touch and go on runway 13, and we flew the pattern for a full stop landing. After touchdown we rolled out. Runway 13 doesn't have a taxiway the last 2000' so we prepared to turn around on the runway and taxi back. To do so we positioned the aircraft to the right of centerline to make a left 180 degree. The twin small aircraft, which was aircraft in use, has only one set of brakes, located on the left pilot side, the student side. As the student applied brakes to slow down for the 180 degree turn, the right brake caught more than the left, and the aircraft turned right. The student saw us turning off the runway, he applied more brake to the right which enhanced the right turn. The correct action would of course have been to let go of the brakes, and let the aircraft roll to a stop. The student sort of panicked, and put aside reason. As we went off the side, I saw the VASI light transmitter on collision course with the left wing. I pulled the mixture and stopped the engine to avoid the propellers to hit. Still the aircraft was gliding on the wet grass, and the left wing hit the VASI. Having dual brakes on the airplane would have possibly prevented the situation. After we pushed the airplane back onto the runway and taxied it back, the left brake was functioning well, even though weaker than the right. The student was a navy fighter pilot with 6 yrs experience from carrier lndgs.

Related reports:

Google
 

Original NASA ASRS Text

Title: RWY EXCURSION.

Narrative: AFTER MORE THAN AN HOUR OF MULTI-TRAINING, THE STUDENT AND I FINISHED UP THE FLT WITH 2 LNDGS. THE FIRST WE MADE TOUCH AND GO ON RWY 13, AND WE FLEW THE PATTERN FOR A FULL STOP LNDG. AFTER TOUCHDOWN WE ROLLED OUT. RWY 13 DOESN'T HAVE A TXWY THE LAST 2000' SO WE PREPARED TO TURN AROUND ON THE RWY AND TAXI BACK. TO DO SO WE POSITIONED THE ACFT TO THE RIGHT OF CENTERLINE TO MAKE A LEFT 180 DEG. THE TWIN SMA, WHICH WAS ACFT IN USE, HAS ONLY ONE SET OF BRAKES, LOCATED ON THE LEFT PLT SIDE, THE STUDENT SIDE. AS THE STUDENT APPLIED BRAKES TO SLOW DOWN FOR THE 180 DEG TURN, THE RIGHT BRAKE CAUGHT MORE THAN THE LEFT, AND THE ACFT TURNED RIGHT. THE STUDENT SAW US TURNING OFF THE RWY, HE APPLIED MORE BRAKE TO THE RIGHT WHICH ENHANCED THE RIGHT TURN. THE CORRECT ACTION WOULD OF COURSE HAVE BEEN TO LET GO OF THE BRAKES, AND LET THE ACFT ROLL TO A STOP. THE STUDENT SORT OF PANICKED, AND PUT ASIDE REASON. AS WE WENT OFF THE SIDE, I SAW THE VASI LIGHT TRANSMITTER ON COLLISION COURSE WITH THE LEFT WING. I PULLED THE MIXTURE AND STOPPED THE ENGINE TO AVOID THE PROPELLERS TO HIT. STILL THE ACFT WAS GLIDING ON THE WET GRASS, AND THE LEFT WING HIT THE VASI. HAVING DUAL BRAKES ON THE AIRPLANE WOULD HAVE POSSIBLY PREVENTED THE SITUATION. AFTER WE PUSHED THE AIRPLANE BACK ONTO THE RWY AND TAXIED IT BACK, THE LEFT BRAKE WAS FUNCTIONING WELL, EVEN THOUGH WEAKER THAN THE RIGHT. THE STUDENT WAS A NAVY FIGHTER PLT WITH 6 YRS EXPERIENCE FROM CARRIER LNDGS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.