20 Sep 2024: PIPER PA-44-180 — Thunderbird Aircraft Co

20 Sep 2024: PIPER PA-44-180 (N2083D) — Thunderbird Aircraft Co

No fatalities • Shakopee, MN, United States

Probable cause

The pilots’ failure to apply carburetor heat during the descent, which resulted in a loss of power on both engines due to carburetor ice.

— NTSB Determination

Accident narrative

On September 20, 2024, at 12:04 central daylight time, a Piper PA-44-180 airplane, N2083D, was substantially damaged when it was involved in an accident near Shakopee, Minnesota. Both pilots were seriously injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 instructional flight. One of the pilots, a flight instructor, was recently hired to instruct in the airplane and was receiving a check out flight from the assistant chief flight instructor. According to both pilots, they departed Flying Cloud Airport (FCM) for a local one-hour flight. The run-up, taxi, and takeoff were all normal. The airplane departed to the southwest and climbed to about 5,500 ft mean sea level. The flight instructor receiving the check-out performed several flight maneuvers in the airplane, then began a descent and proceeded back to FCM. About 3 miles from FCM, and about 800 ft to 1,000 ft above ground level, the right engine began to lose power followed by a loss of manifold pressure. Shortly thereafter, the left engine lost power accompanied by a decrease in manifold pressure. Then both engines lost power completely. The assistant chief flight instructor took control of the airplane while the other pilot pushed the mixture, propeller, and throttle controls to their full forward position, but the airplane continued to lose altitude. The pilots executed a forced landing to a field southwest of FCM. The assistant chief flight instructor stated that they did not execute an emergency checklist because there was no checklist for a dual engine failure, nor did they have time due to their proximity to the ground. The wings, fuselage, and empennage sustained substantial damage. A postaccident examination revealed that there were about 25 gallons of fuel in each nacelle, and both fuel selectors were in the “on” position. No water was detected in the fuel contained in either engine carburetor float bowl. Valvetrain continuity was established in both engines. Compression was achieved on all cylinders when the crankshaft was rotated in each engine. The magnetos on both engines produced spark when their respective impulse couplings were rotated. The carburetor heat for both engines were in the up or “off” position. The temperature, 24°C, and dew point, 12°C, recorded at the destination airport were conducive to “serious icing” at glide power setting. According to the pilot operating handbook for the airplane, carburetor heat should be used “as required” during approach and landing and if engine roughness occurs.

Contributing factors

  • Not used/operated
  • Flight crew
  • Response/compensation
  • Flight crew

Conditions

Weather
VMC, wind 270/09kt, vis 10sm

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