Mechanic’s error leads to forced landing in a field

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The pilot reported that, during a ferry flight, while climbing the Cirrus SR22 to cruise altitude, the engine temperatures increased quickly and the engine then surged.

He “switched” the boost pump, adjusted the mixture lever, and then deployed the ballistic parachute system at 3,500 feet mean sea level.

During the off-airport landing in a field near Sand Creek, Wisconsin, the airplane hit an irrigation sprinkler system, sustaining substantial damage to the fuselage

A post-accident examination by an FAA inspector revealed that two air lines were disconnected and that there were no torque lines on the lines.

According to the FAA inspector, the pilot and a mechanic who had conducted the airplane’s last maintenance reported that the airplane had been flown seven hours since the last maintenance.

The mechanic had replaced three cylinders during the maintenance, which required removal of the air lines. It is likely that, during the maintenance, the mechanic did not properly secure the air reference line, which led to a loss of engine power.

Probable cause: The mechanic’s failure to properly secure the air reference line, which resulted in a loss of engine power.

NTSB Identification: GAA19CA074

This November 2018 accident report is provided by the National Transportation Safety Board. Published as an educational tool, it is intended to help pilots learn from the misfortunes of others.

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