What happened
On March 22, 2005, a Cessna 182M, registration HK-1438, was conducting a routine passenger flight from La Macarena to Villavicencio. The flight, operated by Aeromenegua, proceeded normally for approximately 20 minutes. While climbing through 4,000 feet, the aircraft experienced a sudden, loud impact followed by abnormal engine noises. The pilot observed a significant increase in oil temperature and a decrease in oil pressure, accompanied by a loss of engine performance.
Unable to return to La Macarena due to the loss of power, the pilot declared an emergency and selected a nearby field in the Yarumales area of La Macarena for an emergency landing. During the landing roll, the aircraft traveled approximately 12 meters before the nose gear struck a fallen tree. The impact caused the nose gear to collapse and the aircraft to capsize, leaving it in an inverted position. All five occupants (the pilot and four passengers) sustained minor injuries and were assisted by local residents.
The investigation
The GRIAA investigation focused on the mechanical failure of the powerplant and the circumstances of the landing. Technical analysis of the engine was conducted by a specialized workshop. The investigation also examined the maintenance history of the aircraft and the operational environment of the region.
Findings
- The primary cause of the engine failure was the fracture of the connecting rod in cylinder number one.
- The nose gear collapsed due to severe asymmetric loads exceeding permissible limits upon impact with a fallen tree.
- The aircraft sustained significant damage, including a fractured right wing and various dents, while the fuselage remained largely intact.
- The investigation noted concerns regarding the quality of major maintenance services and the accuracy of flight hour logs for engine components in the region, suggesting that some operators may under-report hours to extend component life.
Safety action
- The GRIAA recommended that Aerocivil conduct detailed inspections of authorized maintenance companies operating in eastern Colombia, specifically focusing on the quality of spare parts and the integrity of inspections.
- It was recommended that authorities implement periodic audits comparing aircraft flight logs with air traffic control records to prevent the fraudulent recording of flight hours.