- Date
- August 25, 1983, 10:00 local (15:00 UTC)
- Place
- Redwood, MS
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N8511SAir Tractor AT-301
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19830825043939A
- Case key
- 5975
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The acft made a forced landing in a soybean field after severe vibration developed during a spraying operation. The pilot stated that the powerplant and flt controls were functioning normally at the time of the accident. An on-scene investigation revealed that the counterweight bearing shaft (p/n 63546) broke allowing the propeller blade to go to higher pitch while the other blade remained at cruise pitch setting. Examination of both propeller blade counterweights revealed that the internal parts had minimum amount of lubrication. The shaft that broke was also rusty and the inner bearing race was broken with 5 ball bearing missing. There were other maintenance dicrepancies on this shaft assembly. The total time of this hamilton standard 12D40 propeller is unknown. The time since the acft was inspected is 194 hours.
Aircraft
- Registration
- N8511S
- Reported as
- Air Tractor AT-301
- Category
- Airplane
- Serial number
- 301-0134
- Airframe hours
- 2,574
- Engine
- P&W R-1340-AN1, 600 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Operator
- Martin L. Hallman
- Registered owner
- Layman G. Sneed
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- Annual · May 9, 1983 · 194 hours before
- Departed
- SNE · Redwood, MS
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 49
- Certificate
- Commercial
- Airplane ratings
- Multi-engine land, Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Front
- Flight hours
- 17,931 total · 2,049 in this make and model · 17,931 as pilot in command · 150 in the last 90 days · 70 in the last 30 days · 5 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 8 statute miles
- Lowest ceiling
- None
- Temperature
- 99 °F
- Altimeter
- 30.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.