CEN20CA153

NTSB accident investigation · Air Tractor AT 602 · Mamou, LA · April 21, 2020

Accident · No injuriesData collectionFinal report
Date
April 21, 2020, 18:00 local (23:00 UTC)
Place
Mamou, LA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N653LAAir Tractor AT 602
Defining event
Takeoff: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report June 29, 2020
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA Flight Standards
FAA report
20200421008739A
Case key
101192

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 airplane's encounter with a sunken area during takeoff from a turf runway, which resulted in the airplane becoming prematurely airborne and impacting a tree and then terrain.

Findings · 2

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.

Runway/land/takeoff/taxi surfaceEnvironmental issues › Physical environment · Effect on operationAir Tractor AT-602: 1 caseAll aircraft: 253 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Effect on operationAir Tractor AT-602: 2 casesAll aircraft: 933 casesProbable cause

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 reported that the turf airstrip had a "sunken area," which created a "ramp." During takeoff, the airplane encountered this portion of the airstrip and became "airborne prematurely." The airplane subsequently settled into ground effect; however, the left wing impacted a small tree near the end of the runway, and the airplane then pitched "downward and left," and the airplane was unable to maintain altitude. The airplane impacted a field off the end of the runway. The airplane sustained substantial damage to the wings and fuselage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that the turf airstrip had a "sunken area" which created a "ramp." During takeoff, when the airplane encountered this portion of the airstrip, it became "airborne prematurely." The airplane subsequently settled into ground effect; however, the left wing impacted a small tree near the end of the runway. The collision caused the airplane to pitch "downward and left" and the pilot was unable to maintain altitude. The airplane came to rest in a muddy rice field off the end of the runway with damage to the wings and fuselage.

Aircraft

Registration
N653LA
Reported as
Air Tractor AT 602 (No Series)
Category
Airplane
Serial number
602-0653
Built
2002
Airframe hours
9,550
Engine
Pratt & Whitney Canada PT6A-60AG, 1,050 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Central Farmers Cooperative, doing business as Central Farmers Flying Service
Registered owner
Central Farmers Cooperative
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · April 17, 2020 · 10 hours before
Departed
PVT · Mamou, LA
Destination
PVT · Mamou, LA
Airport
N/A · Deculus Satellite Airstrip, runway 18, 3,550 × 70 ft, grass/turf
Equipment
Stall warning system

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
45
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
January 8, 2019
Seat
Single
Restraint
4-point
Flight hours
7,700 total · 756 in this make and model · 7,618 as pilot in command · 125 in the last 90 days · 80 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 59 °F
Altimeter
29.95 inHg
Observed at
ACP, 15 nm away

Docket · 2

The files NTSB released with the investigation on May 19, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 33.0 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.

Other investigations on N653LA · 1

Matched to the same aircraft by N-number and date.