As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE DOWNWIND LEG TO LAND GLIDER, OPENED THE AIRBRAKES (ALSO KNOWN AS DIVE BRAKES OR SPOILERS), AND THEY BECAME STUCK IN THE OPEN POSITION. TRIED REPEATEDLY TO CLOSE THEM, BUT THEY WOULD NOT CLOSE. TIGHTENED UP MY PATTERN BECAUSE ACFT WAS DESCENDING RAPIDLY DUE TO THE OPEN AIR BRAKES.