Probable cause
A total loss of engine power in flight due to a loss of engine oil as a result of the separation of the propeller hub components for undetermined reasons.
NTSB analysis
The pilot reported that he was spraying a field when “oil started hitting [his] windshield” and the engine lost oil pressure. Shortly thereafter, the engine “clattered and then quit.” He executed a forced landing into a corn field, where the airplane sustained substantial damage to the left wing. The pilot noted that there was no indication of a problem prior to the loss of engine oil. A postaccident inspection revealed oil spray residue on the engine cowling and windshield. Examination determined that the spring puller bolt assembly and the piston gasket nut had separated from the propeller hub. The components were not recovered, precluding further examination. As a result, the exact nature of the failure could not be determined.
Text from the NTSB. Open the NTSB docket for CEN09CA535 for the full record.
Event
- Date
- Aug 17, 2009
- Type
- Accident
- Place
- Leland, Illinois
- Nearest airport
- Hendrickson Flying Service (IL93)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Air Tractor Inc AT-301
- N-number
- N73102
- Category
- Airplane
- Damage
- Substantial
- Operating rule
- Part 137 (agricultural)
- Purpose of flight
- Aerial application
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.