What happened
On August 6, 2005, a PZL-M18A, registration EC-GAQ, was engaged in aerial firefighting operations near Medeiros, Ourense. The aircraft had departed from its base in Sober to assist in suppressing a small-scale wildfire. During the mission, the pilot performed a water drop over the fire area.
Immediately following the release of the water, the aircraft struck the treetops of three chestnut trees. The impact occurred on the left side of the aircraft at an altitude of approximately 8 to 10 meters. The force of the collision caused the aircraft to continue along its flight path for about 200 meters before striking two pine trees, which ultimately brought the aircraft to a halt. The pilot, who was the sole occupant, sustained fatal injuries due to severe head trauma and polytrauma.
The investigation
The investigation examined the aircraft's maintenance records, the pilot's credentials, and the environmental conditions at the time of the accident. The aircraft was found to be in compliance with its maintenance program, and the engine and propeller showed evidence of providing power at the moment of impact. No mechanical failures were identified prior to the collision.
Investigators also reviewed witness statements from ground personnel and another pilot from the same base. Witnesses noted that the aircraft was flying at a very low altitude and that the fire, while small, was generating significant smoke. The pilot of another aircraft reported that the subject pilot had indicated an intention to attack the fire in an area where the smoke was particularly dense.
Findings
- The pilot was highly experienced, with 3,500 total flight hours and 800 hours on this specific type.
- The aircraft was fully airworthy and maintained according to approved standards.
- Low visibility caused by smoke likely prevented the pilot from detecting the trees located just behind the smoke plume.
- The aircraft was operating at an altitude lower than the height of the obstacles (trees) in its flight path.