What happened
On September 25, 1995, a Cessna 208B (Caravan), registration PT-MEQ, was operating a scheduled cargo and passenger flight from Florianópolis to Blumenau and Erechim. Due to deteriorating weather conditions, the crew initially landed in Navegantes. After receiving radio communication from another aircraft in Blumenau reporting improved weather at that specific location, the crew decided to depart Navegantes for Blumenau.
During the flight, the aircraft was flying below the prescribed altitude of 1,000 feet. The crew navigated through layers of stratus clouds over the cities of Brusque and Guabiruba. While attempting to locate the runway in Blumenau, the aircraft entered instrument flight conditions and eventually collided with the Grunerwinkel mountain at approximately 350 feet. The impact caused the total destruction of the aircraft and a subsequent fire. Both the pilot and co-pilot sustained fatal injuries.
The investigation
CENIPA's investigation examined the aircraft's mechanical condition, the crew's flight experience, and the operational environment. The investigation confirmed that the Cessna 208B was well-maintained, with all certificates and inspections up to date. Engine analysis showed the engine was producing significant power at the moment of impact.
Investigators also scrutinized the crew's flight schedules, finding that both pilots had been subject to intense work schedules that violated Brazilian aeronautical regulations (Law 7.183/198,84). The investigation revealed that the crew had frequently exceeded legal limits for flight hours and duty periods, and had experienced insufficient rest periods. Furthermore, the investigation noted that the crew relied on information from a stationary aircraft in Blumenau regarding weather, which did not account for the unstable conditions within the visual corridor between Navegantes and Blumenau.
Findings
- Adverse weather conditions including low ceilings and poor visibility hindered terrain identification and navigation.
- Navigational errors occurred as the crew failed to use available GPS and magnetic heading resources, leading to geographic disorientation.
- Improper decision-making regarding the decision to proceed with the flight despite unfavorable weather and the decision to fly below safe altitudes.
- Crew fatigue resulting from systemic violations of flight and duty time limitations by the operator.
- Organizational failures including inadequate flight scheduling, insufficient training, and a lack of standardized procedures.
- Environmental illusions caused by the similarity between the Itajaí and Itajaí-Mirim river valleys, which contributed to the crew's loss of situational awareness.