What happened
On 13 November 2022, a Douglas DC-3C, registration C-FTGX, was conducting a specialized science equipment calibration mission over Kalimantan, Indonesia. Operated by ALCI Aviation Ltd. for Bell Geospace Ltd., the aircraft was performing a gravity and magnetic survey under Visual Flight Rules. After completing various flight maneuvers and engine tests, the crew requested clearance from Balikpan tower to perform a touch-and-go landing to verify the stability of newly installed sensors.
Upon touchdown on Runway 07, the pilot experienced an immediate unusual noise from the right side of the aircraft, accompanied by a sudden upward movement of the right wing. The aircraft veered toward the right side of the runway, resulting in the right wheel striking a runway edge light. The pilot managed to regain control of the aircraft by applying the left brake and using the left engine's thrust reverser, eventually returning the aircraft to the runway surface.
The investigation
The KNKT investigation focused on the mechanical state of the landing gear and the sequence of the landing. Investigators confirmed that the aircraft's mass and center of gravity were within safe limits and that no prior system malfunctions were recorded during the flight. The investigation noted that the right wheel assembly had been replaced approximately six months before the incident.
Physical examination of the wreckage revealed that the right tire had been completely torn apart. The impact with the runway edge light and the subsequent taxiing with a damaged wheel caused significant secondary damage, including a broken wheel rim bead seat and heavy wear on the wheel flange due to friction.