What happened
On January 2, 1967, a student pilot was conducting solo flight training at the Agno-Lugano airfield. Following a series of successful landings, the pilot was tasked with performing a specific landing maneuver: a touchdown from a 2,000-foot extended pattern using a left-hand glissade without the use of power (gas).
While the initial approach appeared stable, the pilot executed an imprecise touchdown near the left edge of the runway with a sideslip. This caused the Piper J3C, registration HB-OXK, to veer sharply to the right. The pilot attempted to correct the deviation using left rudder and subsequently applied full power, but these efforts failed to arrest the aircraft's momentum. The aircraft veered off the paved surface and collided with a snowbank approximately 70 cm in height located on the right side of the runway. The impact forced the landing gear inward, and the aircraft slid roughly 10 meters before coming to a halt.
The investigation
The investigation examined the pilot's training history, the aircraft's condition, and the airfield environment. The aircraft, a Piper J3C, was found to be in airworthy condition and well-maintained. The investigation noted that while the paved runway had been cleared of snow, large snowbanks remained on both sides of the runway.
The inquiry also reviewed the student's recent training progress. Records indicated that the student had been undergoing training for approximately three and a half years and had completed over 700 landings, yet had not yet achieved the proficiency required for a private pilot license. On the morning of the accident, the student had performed several satisfactory landings under instruction, which likely influenced the decision to permit the solo maneuver.
Findings
- The primary cause of the accident was the pilot's loss of directional control following an imprecise, sideslipping touchdown.
- The student pilot's attempt to correct the rightward veer with left rudder was ineffective once the excursion had begun.
- The instructor likely overestimated the student's proficiency level based on recent successful landings under dual instruction.
- The presence of high snowbanks on the runway edges may have contributed to pilot uncertainty during the maneuver.
- The aircraft sustained significant damage to the landing gear, engine cowling, fuselage, propeller, and left wing strut, though there were no injuries to the occupant.