FTW90DRG04

NTSB accident investigation · Air Tractor AT-301 · Mission, TX · July 2, 1990

Accident · No injuriesFinal report
Date
July 2, 1990, 14:30 local (19:30 UTC)
Place
Mission, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3653WAir Tractor AT-301
Weather
Visual (VMC) · Day
Status
Completed · report November 9, 1992
Report
Approved by Office Director
Case key
22994

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 failure to maintain proper clearance above the crops he was spraying. A factor was the tree induced mechanical turbulence encountered during the descending turn.

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.

In flight collision with terrain/waterManeuvering - aerial application
Terrain condition - crop
Weather condition - turbulenceFactor
Clearance - not maintainedPilot in commandCause

Analysis

After spraying the field the pilot was 'cleaning up the end' and was flying on the lee side of trees when he felt the left wing drop. According to the pilot, either the landing gear or the left wing caught in the 3 1/2 foot tall grain, and he was unable to raise the wing. The airplane came to rest about 165 yards after initail terrain impact. The pilot felt that he encountered mechanical turbulence, causing the initial loss of control.

Aircraft

Registration
N3653W
Reported as
Air Tractor AT-301
Category
Airplane
Serial number
301-0274
Airframe hours
3,017
Engine
P&W R-1340 AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Putz Aero, Inc
Registered owner
Hopson Putz Dusting Svc, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · February 19, 1990 · 291 hours before

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
47
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
13,526 total · 4,065 in this make and model · 13,372 as pilot in command · 138 in the last 90 days · 41 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 8 knots, gusting 15
Lowest ceiling
2,700 ft broken
Temperature
90 °F, dew point 90 °F
Altimeter
29.00 inHg