WPR14CA294

NTSB accident investigation · Thrush S2RHG T65 · Parma, ID · July 16, 2014

Accident · Minor injuriesData collectionFinal report
Date
July 16, 2014, 10:00 local (16:00 UTC)
Place
Parma, ID
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4036GThrush S2RHG T65
Defining event
Takeoff: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 2014
Report
Approved by Office Director
NTSB office
Western Pacific Region
FAA report
20140716011929A
Case key
89672

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's decision to take off with a tailwind, which resulted in the airplane not attaining sufficient airspeed for takeoff.

Findings · 5

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedThrush S2RHG-T65: 1 caseAll aircraft: 1,681 casesProbable cause
Action: incorrect action selectionPersonnel issues › Action/decision · PilotThrush S2RHG-T65: 1 caseAll aircraft: 397 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationThrush S2RHG-T65: 1 caseAll aircraft: 594 cases
Object/animal/substance: fence/fence postEnvironmental issues › Physical environment · Contributed to outcomeThrush S2RHG-T65: 1 caseAll aircraft: 313 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot stated that he was on his sixth chemical application load of the day. He had a full load of chemicals (500 gallons), which brought the airplane close to maximum gross weight. During takeoff the airplane did not achieve rotation speed before it approached the end of the 2,700-foot-long runway. The pilot raised the nose to take off attitude, the airplane lifted off then settled back down, colliding with a barbwire fence and an irrigation ditch. The horizontal stabilizer and elevator were substantially damaged. Another Ag pilot who witnessed the accident stated that the pilot had taken off with a 6-knot tail wind. There was no report of a mechanical failure or malfunction with the airplane that would have precluded normal operation.

Factual narrative

The pilot stated that he was on his sixth chemical application load of the day. He had a full load of chemicals (500 gallons), which brought the airplane close to maximum gross weight. During takeoff the airplane did not achieve rotation speed before it approached the end of the 2,700-foot-long runway. The pilot raised the nose to take off attitude, the airplane lifted off then settled back down, colliding with a barbwire fence and an irrigation ditch. The horizontal stabilizer and elevator were substantially damaged. Another Ag pilot who witnessed the accident stated that the pilot had taken off with a 6-knot tail wind. There was no report of a mechanical failure or malfunction with the airplane that would have precluded normal operation.

Aircraft

Registration
N4036G
Reported as
Thrush S2RHG T65
Category
Airplane
Serial number
T65HG-018G
Built
2004
Airframe hours
1,925
Engine
Honeywell Garrett TPE991-10-511, 840 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Bain Aviation Inc
Registered owner
Bain Aviation Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · February 27, 2014
Departed
50S · Parma, ID
Destination
50S · Parma, ID
Airport
50S · 50s, runway 12, 2,700 × 50 ft, asphalt

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
51
Injuries
Minor
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
January 4, 2013
Seat
Center
Restraint
4-point
Flight hours
2,800 total · 600 in this make and model · 2,780 as pilot in command · 200 in the last 90 days · 100 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 50 °F
Altimeter
30.02 inHg
Observed at
KONO, 15 nm away

Docket · 2

The files NTSB released with the investigation on September 25, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.