ASK 18 student solo: stall on slip exit in final approach

A student pilot was killed when an ASK 18 stalled and spun from a slip on final at Essen/Mülheim, hitting a parking lot ~400 m short of the field; glider destroyed. On a 4th solo of the day, the student was established in a slip on final when, attempting to change direction or recover, the nose came too high on slip exit; the glider stalled, dropped off to the right, and spun at low altitude. Student: 20 h total / 34 starts on type; the slip exercise had been signed off as 'mastered' less than a month earlier. The solo order was issued without a current dual check despite a multi-day pause; records were incomplete across 8 instructors.

1. Winch launch and circuit: The student flew a winch launch and circuit on the ASK 18, with the supervising instructor observing correct patterns and altitudes from the ground.
2. Limited consolidation on type: The student converted to the ASK 18 after only three solo flights on the ASK 21, providing less consolidation on the new type than is typical before a single-seat conversion.
3. Solo authorized without dual check: The slip exercise was signed off as mastered less than a month before the accident, and the solo flight order was issued after a multi-day pause without a current dual check beforehand.
4. Low-altitude slip exercise zone: Under the training methodology, the slip exercise had to be completed by 50 m AGL, a manoeuvre with a low safety margin that required careful risk assessment before authorization.
5. Slip exit error in final approach: A stable slip was established late in the final approach; when the student attempted to change its direction or exit it, the nose pitched up too high during the transition.
6. Stall and spin entry: Aircraft stalled, dropped off to the right, and entered a spin-like rotation at very low altitude before disappearing behind trees.
7. Parking lot impact - fatal: The glider struck the ground near-vertically in a parking lot about 400 m short of the airfield and broke up; the student sustained fatal injuries, with no technical defect found.