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NTSB Report
August 17, 2009 · Air Tractor AT-301 · N73102
Leland, IL
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
August 17, 2009
Injury Outcomes
No injuries (1 uninjured)
Location
Leland, IL
Aircraft
Air Tractor AT-301
Tail Number
N73102
Operator
Hendrickson Flying Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN09CA535
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.
NTSB 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.
Full Narrative
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. 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 post accident 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.
Flight
Event TypeAccident
Event Time18:00 CDT
Nearest AirportHendrickson Flying Service (25nm)
Flight Plan FiledUnknown
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-301
Tail NumberN73102
Aircraft CategoryAir
DamageSubstantial
OperatorHendrickson Flying Service
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R1340 SERIES · Reciprocating · 600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 69 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind200° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point70 F
Altimeter29.96 inHg
Observation Time22:52
Weather SourceWFAC