SEA83LA167

NTSB accident investigation · Grumman G-164A · Klamath Falls, OR · August 5, 1983

Accident · No injuriesLimited investigationFinal report

Date: August 5, 1983, 12:15 local (19:15 UTC)
Place: Klamath Falls, OR
Injuries: 1 uninjured
Damage: Destroyed
Phase of flight: Maneuvering
Aircraft: N6664QGrumman G-164A
Weather: Visual (VMC) · Day
Status: Completed
Report: Approved by Office Director
FAA report: 19830805042389A
Case key: 39746

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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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.

Dragged wing,rotor,pod,float or tail/skidManeuvering - aerial application

Window,flight compartment window/windshield - dirty(foggy)Factor

Visual lookout - not possiblePilot in commandCause

In-flight planning/decision - poorPilot in commandCause

In flight collision with terrain/waterManeuvering - aerial application

Terrain condition - water,glassyFactor

Analysis

The acft dragged a wing in a lake and cartwheeled during an aerial application maneuver. The pilot said he had turned away from the field he was spraying to remove the bugs from his windshield. The acfts wing struck a lake surface in the turn, cartwheeled and came to rest under 5 ft of water. The pilot stated the bugs were so thick that he was having difficulty maintaining visual reference.

Aircraft

Registration: N6664Q
Reported as: Grumman G-164A
Category: Airplane
Serial number: 1698
Airframe hours: 2,551
Engine: P&W R-1340-AN1, 600 horsepower, reciprocating
Damage: Destroyed
Flight: Aerial application · Part 137
Registered owner: Robert Yancey
Airworthiness certificate: Special, Restricted (Special)
Last inspection: Annual · February 8, 1983
Departed: LMT · Klamath, OR
Airport: NONE

N6664QRegistration cancelled Dec 21, 1984 · Grumman Acft ENG Cor-Schweizer G-164BS/N 1698 Airframe modelGrumman Acft ENG Cor-Schweizer G-164B

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: 28
Certificate: Commercial
Airplane ratings: Single-engine land
Medical: Class 2, Valid Medical--no waivers/lim.
Seat: Front
Flight hours: 3,190 total · 1,050 in this make and model · 3,130 as pilot in command · 120 in the last 90 days · 1 in the last 24 hours

Weather

Conditions: Visual (VMC) · Day
Wind: Calm
Visibility: 30 statute miles
Lowest ceiling: 12,000 ft broken
Temperature: 81 °F, dew point 39 °F
Altimeter: 30.00 inHg
Observed at: LMT1, 12 nm away

FAA reports on this event · 1

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

Accident 19830805042389AScwzer G164A · Klamath Falls, ORDuring low level flight, pilot attempted to clean windshield and wing hit water causing aircraft to cartwheel.Aug 5, 1983 · N6664Q · Destroyed