DEN84LA206

NTSB accident investigation · Grumman G-164A · Wyndmere, ND · July 1, 1984

Accident · No injuriesLimited investigationFinal report
Date
July 1, 1984, 08:10 local (13:10 UTC)
Place
Wyndmere, ND
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4638Grumman G-164A
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19840701029009A
Case key
16421

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.

On ground/water encounter with terrain/waterTakeoff - roll/run
Terrain condition - cropFactor
Clearance - misjudgedPilot in commandCause
Loss of control - on ground/waterTakeoff - roll/run
Directional control - not possiblePilot in command
Ground loop/swerve - uncontrolledPilot in command
Nose overTakeoff
Terrain condition - wetFactor
Terrain condition - softFactor

Analysis

Sod was worn from the middle of the strip & the strip was wet. Therefore, the plt elected to use the left side of the sod strip for takeoff. During the takeoff roll, the left spray boom dragged into wheat that was growing beside the rwy & the acft veered left. Strips of wheat about 30 ft wide had been planted on each side of the rwy. After crossing the wheat, the acft went into a wet bean field & nosed over. The plt was unaware that the boom had dragged in the wheat & veered the acft until after the accident.

Aircraft

Registration
N4638
Reported as
Grumman G-164A
Category
Airplane
Serial number
1071
Airframe hours
4,500
Engine
P&W R-985, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Thompson Aerial
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 15, 1984
Airport
NA21 · Thompson, runway 36, 2,600 × 60 ft, grass/turf

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
24
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
486 total · 192 in this make and model · 366 as pilot in command · 249 in the last 90 days · 7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
60 statute miles
Lowest ceiling
None
Temperature
75 °F

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 N4638 · 2

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