Tuesday, April 18, 2017

Grumman Schweizer G-164A, N9533: Accident occurred April 17, 2017 in Palmer, Washington County, Kansas

The National Transportation Safety Board did not travel to the scene of this accident.

Federal Aviation Administration / Flight Standards District Office; Wichita, Kansas 

Aviation Accident Preliminary Report - National Transportation Safety Board:  https://app.ntsb.gov/pdf


NTSB Identification: CEN17LA163
14 CFR Part 137: Agricultural
Accident occurred Monday, April 17, 2017 in Palmer, KS
Aircraft: GRUMMAN ACFT ENG COR-SCHWEIZER G 164A, registration: N9533
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 April 17, 2017, about 1145 central daylight time, a Grumman G164A agricultural airplane, N9533, registered to Hunninghake Aerial Spraying LLC of Baileyville, Kansas, sustained substantial damage during a forced landing after a loss of engine power in the vicinity of Palmer, Kansas. The commercial pilot was not injured. The aerial application flight was being conducted under the provisions of Federal Code of Regulations Part 137. Visual meteorological conditions prevailed throughout the area and a flight plan was not filed. The flight originated at 1030 from the pilot's private airstrip near Baileyville, Kansas.

According to the pilot, the aircraft was flying in a southerly direction over the application area when he heard a "pop" sound, The pilot then heard a louder "pop" sound and the engine lost power. The pilot continued flying in a southerly direction about 1/3 of a mile before being forced to land. The pilot turned to the left to avoid a pasture fence and landed in a southeast direction in a newly planted wheat field. During the landing, the aircraft rolled over 5 terraces. Skid marks and numerous blade ground strikes where found at each terrace location. Ground scaring indicated that the propeller/engine separated from the aircraft before it spun 180 degrees and came to a stop. The pilot exited the airplane uninjured. The right lower wing at the forward inboard spar and the engine firewall was found severely wrinkled. During the landing sequence, the hopper tank dump valve was opened and the herbicide chemical escaped. 

Inspection of the engine at the accident site by an FAA inspector, revealed a crack on an engine cylinder located at the 3 o'clock position of the engine. According to log book entries, AD 99-00-02 visual inspection for cylinder cracks, was completed at the last annual inspection conducted on 11/28/2016, 37.1 hours prior to the accident.

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