CEN20CA341

NTSB accident investigation · Grumman G164 · Rice, MN · August 16, 2020

Accident · No injuriesClass 4 · Data collectionFinal report
Date
August 16, 2020, 09:00 local (14:00 UTC)
Place
Rice, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N997QCGrumman G164
Defining event
Landing: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA Flight Standards
FAA report
20200816012759A
Case key
101804

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

On this page

Probable cause

The pilot did not maintain control of the airplane during the landing.

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.

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 was en route to spray a field when he received a call over the company radio to return to the airport. He returned for landing with the full application load. The airstrip consisted of gravel and asphalt; grass areas bordered the runway. The main wheels touched down near the runway threshold; the initial portion of the runway was gravel. The tail wheel settled onto the runway as the airspeed dissipated, and the pilot brought the propeller into reverse. However, the tailwheel encountered a “bump” which started some pitch oscillations; this might have occurred at the transition from gravel to asphalt. The pilot reported no elevator or rudder authority, possibly due to the reduced airflow over the empennage resulting from the reverse thrust. He noted that a go-around was not an option at that point. The airplane yawed to the right and departed the paved area, proceeded into the grass area, and finally into the soft ground adjacent to the runway causing the airplane to nose over. The pilot stated that there were no mechanical anomalies with the airplane that would have precluded normal operations.

Aircraft

Registration
N997QC
Reported as
Grumman G164 (B)
Category
Airplane
Serial number
568B
Built
1979
Airframe hours
9,938
Engine
Honeywell TPE-331-1-101, 665 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · December 17, 2019
Departed
PVT · Rice, MN
Destination
PVT · Rice, MN
Airport
PVT · Private, runway 18, 2,200 × 70 ft, gravel
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
56
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
March 12, 2020
Seat
Single
Restraint
4-point
Flight hours
8,765 total · 495 in this make and model · 8,765 as pilot in command · 465 in the last 90 days · 100 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
0 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 61 °F
Altimeter
30.05 inHg
Observed at
LXL, 12 nm away

Docket · 2

The files NTSB released with the investigation on July 21, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 39.2 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.