HEIMGARTNER AVIATION LLC: http://registry.faa.gov/N6894Q
FAA Flight Standards District Office: FAA Spokane FSDO-13
NTSB Identification: WPR16LA082
14 CFR Part 137: Agricultural
Accident occurred Friday, March 11, 2016 in Juliaetta, ID
Aircraft: GRUMMAN G164, registration: N6894Q
Injuries: 1 Uninjured.
This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
On March 11, 2016, about 1725 Pacific standard time, a Grumman G-164A, N6894Q, experienced a partial loss of power and collided with terrain during an off airport landing in Juliaetta, Idaho. Heimgartner Aviation LLC., was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 137. The commercial pilot, the sole occupant, was not injured; the airplane sustained substantial damage. The local aerial application flight departed from a private road in Juliaetta about 1720. Visual meteorological conditions prevailed and the pilot did not file a visual flight rules (VFR) flight plan.
The pilot stated that the purpose of the flight was to apply 1,600 pounds of fertilizer to wheat fields. He had completed around 20 loads earlier in the day which equated to about 4 hours of flight time. The airplane departed with a half-full fuel tank and climbed to about 500 feet above ground level (agl). After configuring the airplane to the appropriate manifold pressure and turning the carburetor heat on, the pilot maneuvered the airplane toward the field he intended to spray. While in level flight, about 300 feet agl, the engine began to violently shudder and make loud backfiring noises. The engine experienced a partial loss of power, and the airplane was unable to maintain altitude. During the off airport forced landing, the airplane landed hard and nosed over, coming to rest inverted.